Good few in CID reversed, driving (7)
I believe the answer is:
dynamic
'driving' is the definition.
(similar in meaning)
'good few in cid reversed' is the wordplay.
'good few' becomes 'many' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' means one lot of letters goes inside another.
'reversed' shows that the letters should be reversed in order.
'many' placed into 'cid' is 'cimanyd'.
'cimanyd' written backwards gives 'DYNAMIC'.
Can you help me to learn more?
(Other definitions for dynamic that I've seen before include "Forceful" , "I'm Candy (anag) - full of beans" , "Energetic, with great force of character" , "Powerful and vigorous" , "Driving" .)