Undermine company male with potential (10)
I believe the answer is:
compromise
'undermine' is the definition.
'company male with potential' is the wordplay.
'company' becomes 'co' (abbreviation).
'male' becomes 'm' (common abbreviation).
'with' is a charade indicator (letters next to each other).
'potential' becomes 'promise' (I've seen this before**).
'co'+'m'+'promise'='COMPROMISE'
(Other definitions for compromise that I've seen before include "Settlement" , "Agree a middle way" , "accommodation" , "Middle course" , "Settle by concession" .)