School member in style of pensioner? (4,6)
I believe the answer is:
grey mullet
'school member' is the definition.
(school can mean a group of fish)
'style of pensioner?' is the wordplay.
I cannot quite understand how this works, but
'style' could be 'mullet' (I've seen this before) and 'mullet' is present in the answer.
The remaining letters 'grey' 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).
'in' acts as a link.
(Another definition for grey mullet that I've seen is " swimmer".)