Stop - I'm getting deep in trouble (6)
I believe the answer is:
impede
'stop' is the definition.
(thesaurus)
'i'm getting deep in trouble' is the wordplay.
'getting' is a charade indicator (letters next to each other).
'in trouble' is an anagram indicator.
'deep' is an anagram of 'pede'.
'im'+'pede'='IMPEDE'
(Other definitions for impede that I've seen before include "Stand in the way of progress" , "Hinder, inhibit" , "Hinder, be obstructive" , "Delay; block progress of" , "Hold back" .)