Stop: I'm deep in bother (6)

I believe the answer is:

impede

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'stop' is the definition.
(thesaurus)

'i'm deep in bother' is the wordplay.
'i'm deep' anagrams to 'IMPEDE'.
Though, I am unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for impede that I've seen before include "Hinder, form an obstacle to" , "Obstruct, hold up progress" , "Handicap" , "Put obstacle in the way, hinder" , "Hold back" .)

I've seen this clue in The Sun.

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