Seeing red top worn by girl (5)
I believe the answer is:
livid
'seeing red' is the definition.
(both can mean very angry)
'top worn by girl' is the wordplay.
'top' becomes 'lid' (lid is a kind of top).
'worn by' is an insertion indicator (outside letters are worn by those on the inside).
'girl' becomes 'vi' (short for Violet).
'lid' placed around 'vi' is 'LIVID'.
(Other definitions for livid that I've seen before include "some more [old cardinals]" , "Angry (person, bruise)" , "Bloodless" , "Black and blue" , "Bluish-grey" .)