Could one do better than doff it? (3)
I believe the answer is:
cap
'could' is the definition.
The answer and definition can be both to do with fundamental existence as well as being verbs in their base form.
Perhaps there's an association between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for cap that I've seen before include "International sportsman" , "Stopper" , "Seal off oil-well" , "Top; hat" , "subsidy regime" .)