Play one of those perfect union men (2,5,7)
I believe the answer is:
an ideal husband
'play' is the definition.
(Oscar Wilde play)
'one of those perfect union men' is the wordplay.
I cannot quite see how this works, but
'one' could be 'an' (an apple is one apple) and 'an' is found within the answer.
'perfect' could be 'ide' (I've seen this in another clue) and 'ide' is found within the answer.
'union' could be 'u' (common abbreviation as in Trades Union Congress) and 'u' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for an ideal husband that I've seen before include "best mate?" , "production around The Chilterns" , "Dramatic scenes involving perfect groom" , "best man?" , "comic drama" .)