Supervised by male class, Hazel exemplifies such work in 1950s (5,4,4)
I believe the answer is:
under milk wood
'hazel exemplifies such work in 1950s' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'supervised by male class' is the wordplay.
I cannot really see how this works, but
'male' could be 'm' (common abbreviation) and 'm' is located in the answer.
'class' could be 'ilk' (I've seen this before) and 'ilk' is located in the answer.
The remaining letters 'underwood' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for under milk wood that I've seen before include "Fail fully to exploit deal" , "Radio play by Dylan Thomas" , "Welsh play" , "Radio poem by Dylan Thomas" , "Work by Dylan Thomas" .)