Survival of software licence (5)
I believe the answer is:
relic
'survival' is the definition.
(I have seen 'Ancient survival ' mean 'relic' so perhaps 'survival' could also mean 'relic')
'of software licence' is the wordplay.
'of' says the answer is hidden in the clue.
'RELIC' is hidden within 'software licence'.
(Other definitions for relic that I've seen before include "Paper craft" , "Memorial object" , "Piece left over" , "Left over item, sometimes sacred" , "Survivor from the past" .)