It's fun (8)
I believe the answer is:
pleasure
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">it's fun</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 pleasure that I've seen before include "Urgent entreaty begins gratification" , "Enjoyment, happiness" , "A very desirable feeling" , "A repulse (anag.)" , "amusement" .)