I break into office cabinet, delaying speech (10)
I believe the answer is:
filibuster
'speech' is the definition.
(thesaurus)
'i break into office cabinet delaying' is the wordplay.
I cannot really see how this works, but
'i' is within the answer.
'break' could be 'bust' (synonyms) and 'bust' is present in the answer.
The remaining letters 'flier' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for filibuster that I've seen before include "delaying manoeuvre" , "Speak at length to obstruct parliamentary proceedings" , "Waste time by making long speeches" , "Delaying tactic to obstruct legislation" , "delaying tactics" .)