Crossword Genius

Resin base (7)

Ross

I believe the answer is:

polymer

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">resin base</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 polymer that I've seen before include "Repeated-molecule compound" , "Mo, reply to the large molecule" , "Substance such as nylon" , "Eg, protein, rubber etc." , "Substance with large molecules of smaller units" .)

I've seen this clue in The Sunday Times and The Times.
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