Fifty in conflict may be put to it (6)
I believe the answer is:
flight
'put to it' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'fifty in conflict' is the wordplay.
'fifty' becomes 'L' (Roman numeral).
'in' is an insertion indicator.
'conflict' becomes 'fight' (fight is a kind of conflict).
'l' inserted into 'fight' is 'FLIGHT'.
'may be' acts as a link.
Can you help me to learn more?
(Other definitions for flight that I've seen before include "Journey by air" , "Stairs; escape" , "Aviation" , "A series of stairs" , "Series of steps" .)