Prevent attendant getting prison sentence in final part of play (8,4)
I believe the answer is:
stoppage time
'sentence in final part of play' is the definition.
I know nothing about this answer so I can't tell whether this works.
'prevent attendant getting prison' is the wordplay.
I cannot really understand how this works, but
'prevent' could be 'stop' (stopping is a kind of preventing) and 'stop' is found in the answer.
'attendant' could be 'page' (page is a kind of attendant) and 'page' is found within the answer.
'prison' could be 'time' (as in a spell in prison) and 'time' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for stoppage time that I've seen before include "when all will be on strike?" , "Given end of game" , "Whistle expected soon now" , "match supplement?" , "few extra minutes" .)