Regret giving agent ten orders (6)
I believe the answer is:
repent
'regret' is the definition.
(I know that regret can be written as repent)
'giving agent ten orders' is the wordplay.
'giving' says to put letters next to each other.
'agent' becomes 'rep' (short for representative).
'orders' is an anagram indicator.
'ten' with letters rearranged gives 'ent'.
'rep' next to 'ent' is 'REPENT'.
(Other definitions for repent that I've seen before include "Feel regret/remorse" , "Be sorry for wrongdoing" , "Feel guilty" , "Feel remorse for" , "Turn away from sin" .)