Visually embarrassed about daughter (3)
I believe the answer is:
red
'visually embarrassed' is the definition.
(someone may blush or go red when embarrassed)
'about daughter' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'daughter' becomes 'd' (genealogical abbreviation).
're'+'d'='RED'
(Other definitions for red that I've seen before include "'If you see it, perhaps you're angry (3)'" , "Glowing" , "Colour of blood" , "could be a Marxist" , "eg Cardinal" .)