Long-term convict (5)
I believe the answer is:
lifer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">long-term convict</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lifer that I've seen before include "One behind bars for ever" , "Long-term prisoner" , "One given lots of porridge" , "Rifle (anag.)" , "One with maximum sentence" .)