Tough training venue (4,4)
I believe the answer is:
boot camp
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tough training venue</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for boot camp that I've seen before include "where terrier potentially goes" , "Harsh (US) military training establishment" , "correctional facility" , "US training centre for military recruits" , "Centre for juvenile offenders" .)