Search for groom (4)

I believe the answer is:

comb

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But I can't explain it at all! Could you help me understand?

(Other definitions for comb that I've seen before include "Search methodically" , "Red crest on a cock's head" , "Rummage through" , "Fastening spikes" , "Crest on the head of some birds" .)

I've seen this clue in The Hindu.

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