Act like a suck-up (6)

I believe the answer is:

grovel

(Other definitions for grovel that I've seen before include "Humble oneself in supplication" , "Crawl, fawn" , "Cower, abase oneself" , "Behave obsequiously, humble oneself" , "Cringe in abject manner" .)

I've seen this clue in the Universal.

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