In council is somewhat agile (7)
I believe the answer is:
lissome
'agile' is the definition.
(I've seen this in another clue)
'in council is somewhat' is the wordplay.
'in' indicates the answer is hidden within the clue.
'LISSOME' is hidden within 'council is somewhat'.
(Other definitions for lissome that I've seen before include "Lithe; nimble" , "Moving supply" , "Willowy" , "Thin - supple - graceful" , "Oil mess (anag)" .)