Brush pole stuck in wreck (3,2)
I believe the answer is:
run in
'brush' is the definition.
(I've seen this before)
'pole stuck in wreck' is the wordplay.
'pole' becomes 'n' (abbreviation for North, as in North Pole).
'stuck in' means one lot of letters goes inside another.
'wreck' becomes 'ruin' (I've seen this in another clue).
'n' inserted inside 'ruin' is 'RUN-IN'.
(Other definitions for run in that I've seen before include "Brush" , "Quarrel; set-to" , "Carefully bring to full working order - arrest" , "Quarrel; arrest" , "Apprehend" .)