Small acting role (3,4)
I believe the answer is:
bit part
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small acting role</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bit part that I've seen before include "cameo" , "Tiny or non-speaking dramatic role" , "Very minor role" , "extra work, perhaps" , "Tiny or non-speaking role in play" .)