Gents' hairdresser (6)
I believe the answer is:
barber
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gents' hairdresser</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for barber that I've seen before include "Rossini opera 'The ...... of Seville'" , "who performs on the fringe?" , "One who cuts hair" , "Sweeney Todd's profession in Fleet Street" , "Hairdresser who also shaves beards" .)