Crossword Genius

Upset plans (5,1,7,2,3,5)

Ross

I believe the answer is:

throw a spanner in the works

'upset plans' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for throw a spanner in the works that I've seen before include "Upset plans (5,1,7,2,3,5)" , "cause upset" .)

I've seen this clue in The Times.
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