One of those blooming black-eyed girls? (5)
I believe the answer is:
susan
'those blooming black-eyed girls?' is the definition.
I can't tell whether this definition defines the answer.
'one' is the wordplay.
I cannot quite see how this works, but
'one' could be 'an' (an apple is one apple) and 'an' is located in the answer.
The remaining letters 'sus' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'of' acts as a link.
Can you help me to learn more?
(Other definitions for susan that I've seen before include "She's a black-eyed flower" , "Server at table's no lazy" , "-- Howatch, novelist" , "- - Sarandon (films)" , "Girl's name, meaning lily" .)