no HQ. There are some multigaming clans which have divisions for different games, such as Counter-Strike, Warcraft III, Q3, Painkiller, Fifa, etc. Like KO would create a Fifa squad or a Counter-Strike one.

do they have sponsor ?

clan is stm like caste, woriors, that train thier skills, they wona be perfect on what they doing

team is bunch of ppl that play under same flag, in some cases the falg is (money)

if the players of clan dont playing all games and train theiers skils in all games and u can group these ppl to smaler teams, they are not caln but team, team can have sub/teams (divisions).

caste was always only one organism, that think the same and do the same, a clan

u can say about a fammily that they are "clan gonczewskich" bycose they have the same blood, and they are family

but u cant say about shol kids that playing basketball, that they group to two clans, they group to two teams.

uhm, you have another view on the word "clan" HQ which is not wrong, but actually gramatically correct.
But in the e-sports scene the word "clan" is almost always associated with "team". Thats why i called this team a clan, because im used to that language.

on-topic now: gl with your search alpha.