Ardent male lover (5)
I believe the answer is:
romeo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ardent male lover</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 romeo that I've seen before include "Star-crossed lover" , "Lover; R (radio comms.)" , "Shakespearean hero" , "Peripheral figure" , "Lover boy" .)