Border agent consequently impounds rocket (9)
I believe the answer is:
reprimand
'rocket' is the definition.
(both can refer to an instance of criticism)
'border agent consequently impounds' is the wordplay.
'border' becomes 'rim' (I've seen this before**).
'agent' becomes 'rep' (short for representative).
'consequently' becomes 'and'.
'impounds' is an insertion indicator.
'rep'+'and'='repand'
'rim' inserted within 'repand' is 'REPRIMAND'.
(Other definitions for reprimand that I've seen before include "Severe reproof" , "telling off" , "Formal censure" , "Expression of disapproval" , "Official scolding" .)