Indian tea region (5)
I believe the answer is:
assam
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">indian tea region</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 assam that I've seen before include "Asian area?" , "Tea-producing Indian state" , "India tea-producing state" , "Type of tea" , "Kind of Indian tea" .)