Peck, smear (3)
I believe the answer is:
dab
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">peck</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">smear</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for dab that I've seen before include "Expert; flatfish" , "Press gently; flatfish" , "Expert; flat fish" , "Gently wipe" , "[SOMETHING FISHY]" .)