Selected to play, but not on the wing? (6)
I believe the answer is:
inside
'selected to play' is the definition.
I can't tell whether this definition defines the answer.
'not on the wing?' is the wordplay.
'not' becomes 'in' (I can't justify this - if you can you should give a lot more credence to this answer).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'the wing?' becomes 'side' (eg the wings of a building are on its sides).
'in'+'side'='INSIDE'
'but' acts as a link.
Can you help me to learn more?
(Other definitions for inside that I've seen before include "serving porridge" , "Behind bars (sl.)" , "Enid is (anag) - within" , "close to centre" , "Inner surface" .)