Yielded five keys (5)
I believe the answer is:
ceded
'yielded' is the definition.
('cede' can be a synonym of 'yield')
'five keys' is the wordplay.
I cannot really understand how this works, but
'keys' could be 'de' (I've seen this in other clues) and 'de' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for ceded that I've seen before include "Given up" , "Yielded, surrendered" , "Relinquished" , "Gave up (power)" , "Granted" .)