Bit role (4)
I believe this clue is a double definition.
'bit' is the first definition.
(I've seen this in other clues)
'role' is the second definition.
(eg a part or role in a film)
(Other definitions for part that I've seen before include "goodbye" , "Portion, segment" , "Bit - leave" , "Divide; role" , "unemployed actor hopes for" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bit role</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 cameo that I've seen before include "relief work" , "Brief role" , "Brooch with an engraving in low relief" , "Small role for a well-known actor" , "Item of jewellery with a portrait - distinguished actor's minor role" .)