"Tom Thumb" star Tamblyn (4)
I believe the answer is:
russ
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tom thumb star tamblyn</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 russ that I've seen before include "-- Abbot, comedian, actor" , "Maybe Tchaikovsky" .)