I really didn't mean that sounds like Ravel (4)

I believe the answer is:

knot

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'ravel' is the definition.
(synonyms)

I don't understand the remainder of the clue.

(Other definitions for knot that I've seen before include "Tie cord - lump in timber" , "measure of pace" , "Unit of length used in navigation" , "Bird; speed; tie" , "Small group (of people); tied rope" .)

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