Meeting the required standard, until put out (2,2,5)
I believe the answer is:
up to snuff
'meeting the required standard' is the definition.
(up to snuff means meeting a sufficient standard)
'until put out' is the wordplay.
'until' becomes 'up to' (I've seen this in another clue).
'put out' becomes 'snuff' (I've seen this before).
'upto'+'snuff'='UP TO SNUFF'
(Other definitions for up to snuff that I've seen before include "Dependent on tobacco" , "Feeling good" , "Of a suitable standard" , "arrived at Standard?" , "in good health" .)