London gallery (4)
I believe the answer is:
tate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">london gallery</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tate that I've seen before include "Britain/Modern gallery" , "One of four art galleries in England" , "Well-known London art gallery" , "Lord Sugar" , "Art gallery benefactor" .)