I returned dirty look Liberal ignored (3)
I believe the answer is:
ego
'i' is the definition.
('I' in Latin)
'returned dirty look liberal ignored' is the wordplay.
'returned' shows that the letters should be reversed in order.
'dirty look' becomes 'ogle' (I've seen this in another clue).
'liberal' becomes 'l' (abbreviation).
'ignored' indicates named letters should be taken away.
'ogle' with 'l' removed is 'oge'.
'oge' in reverse letter order is 'EGO'.
(Other definitions for ego that I've seen before include "Aspect of the personality" , "Self-esteem or self-importance" , "(Self-assertive) personality" , "Conscious self" , "Consciousness" .)