Might one not at some point be able to gather large support? (10)
I believe the answer is:
cantilever
'support?' is the definition.
(cantilever is a kind of support)
'might one not at some point be able to gather large' is the wordplay.
I cannot really see how this works, but
'might' could be 'can' and 'can' is found within the answer.
'one' could be 'i' (Roman numeral) and 'i' is found in the answer.
'point' could be 'e' (compass point) and 'e' is present in the answer.
'large' could be 'l' (eg in clothes sizes) and 'l' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for cantilever that I've seen before include "Projecting beam fixed at one end" , "Beam supported at only one end" , "bridge design" , "Projecting mass" , "support at one end" .)