Maybe guy’s iffy gel, mostly for styling (6)
I believe the answer is:
effigy
I'm afraid I can't even guess how this answer relates to the clue.
Can you help me to learn more?
(Other definitions for effigy that I've seen before include "Model of a person made to be damaged or destroyed as a protest" , "Graven image" , "A guy, for instance" , "Crude model of person" , "(Burnable) representation of a person" .)