Saline (5)
I believe the answer is:
salty
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">saline</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for salty that I've seen before include "Engagingly stimulating or provocative" , "Saline" , "Sharp (language, humour)" , "Brackish" , "Piquant" .)