Second insect found in woman's top (6)
I believe the answer is:
blouse
'woman's top' is the definition.
(I've seen this before)
'second insect' is the wordplay.
'second' becomes 'b' (B can mean second eg B-side).
'insect' becomes 'louse' (synonyms).
'b'+'louse'='BLOUSE'
'found in' is the link.
(Other definitions for blouse that I've seen before include "Top garment - so blue (anag)" , "Woman's buttoned top" , "Within a building" , "Ladies' top" , "Woman's shirtlike garment" .)