The word clique indicates a group of people, however, I submit that a more apt word would be a team. Each team has their leader, and the goal of the members of that team is to raise the power of their leader while simultaneously being pulled up behind him/her, thus raising their own apparent power.
Unfortunately, in office politics, there are normally more than two teams, and many people are left out of the political disputes because:
a) They opt to not directly support any team;
b) They haven't yet been picked by a team;
c) They have been "booted" from a team through their actions/inactions.
We'll save the person in situation 'a' for last as he is our "loner".
The person in situation 'b' is relatively safe from a direct attack because of their anonymity. People from the different teams don't yet know their concerns/capabilities/history, and thus are more apt to try and "win" that person to their side. In a few cases, they may be "attacked" by a team, but this will usually result in protection being offered by an opposing team.
The person in situation 'c' is relatively safe as well, as people from other teams will either choose to recruit him/her to their side, or will ignore him/her completely as the persons original team will eventually welcome him/her back with open arms.
However, the person in situation 'a' is open to attacks from all sides. In this case, you have a person who MUST be able to defend their own actions/inactions/plans/policies etc... This person is (in the context of this thread) a loner.
Is this person anti-social? not really. Is this person good at his job? he/she MUST be! Does this person do well with customers/clients? probably.
This loner is simply someone who is there to do a job the best he/she can, and who is not interested in becoming involved in the various power struggles going on in the organization. Each side can use this person to their advantage, but this person generally will help ALL teams if asked.
Over time, this person is seriously affected by office politics, but only for the reason that the different "teams" that are out there start to sense a "threat" to their power base in this person. And since he/she is not on THEIR team, then they must be against their team.
For some reason, office politic teams cannot seem to realize that 'loners' like this are not there to take their power away, but rather, if used appropriately, can significantly enhance the power the teams currently have.
I'm not sure if what I have explained made any sense (to me it makes perfect sense), however, I have tried to explain it as best I can. Maybe the purpose of this post is simply to let people out there know, that people who don't want to get involved in politics are much better to be USED by the people for their political gains, then attacked for those same political gains.
Take what you can from it :)