Crossword Genius

Opens up in a way to tip from supplicants (8)

Ross

I believe the answer is:

unclasps

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'opens' is the definition.
(I've seen this in another clue)

I don't understand the rest of the clue.

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(Another definition for unclasps that I've seen is " Releases fastener".)

I've seen this clue in The Irish Times.
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