Embarrassed about daughter (3)
I believe the answer is:
red
'embarrassed' is the definition.
(I've seen this before)
'about daughter' is the wordplay.
'about' becomes 're' (regarding**).
'daughter' becomes 'd'.
're'+'d'='RED'
(Other definitions for red that I've seen before include "Colour for danger" , "Scarlet or vermilion" , "'If you see it, perhaps you're angry (3)'" , "Colour of 1 across" , "could be a Marxist" .)