It may be inflated (3)
I believe the answer is:
ego
'it may be inflated' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ego that I've seen before include "One's image of oneself" , "(Person's) sense of self-esteem" , "Conceit - the Latin "I"" , "Inner self" , "One's sense of self-importance" .)