V (4)
I believe the answer is:
five
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">v</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for five that I've seen before include "Fourth part of score" , "Number of towns Arnold Bennett's Anna is associated with" , "End of the working day?" , "V as a numeral" , "famous group" .)