Prison sentence (4)
I believe the answer is:
time
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">prison sentence</span>' is the definition.<br/ ><span class="explanation-format__explanation">(as in 'doing time')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for time that I've seen before include "Indefinite period" , "Pub closing call" , "Era" , "Prison sentence; tempo" , "'Every ... we say goodbye, I cry a little' /Cole Porter" .)