Setter gasping a small feature of Windows (8)
I believe the answer is:
casement
'feature of windows' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'setter gasping a small' is the wordplay.
I cannot quite understand how this works, but
'setter' could be 'me' (the setter of the clue) and 'me' is found in the answer.
'a' is found in the answer.
'small' could be 's' (abbreviation - e.g. clothes size) and 's' is present in the answer.
The remaining letters 'cent' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for casement that I've seen before include "Hinged window-sash" , "Type of window" , "Irish nationalist" , "Sir Roger" , "Vertically hinged window" .)