Feel for company partner employing skinflint (11)
I believe the answer is:
commiserate
'feel for' is the definition.
(commiserating is a kind of feeling for)
'company partner employing skinflint' is the wordplay.
'company' becomes 'co' (abbreviation).
'partner' becomes 'mate' (synonyms).
'employing' means one lot of letters goes inside another.
'skinflint' becomes 'miser' (synonyms).
'mate' placed around 'miser' is 'mmiserate'.
'co'+'mmiserate'='COMMISERATE'
(Other definitions for commiserate that I've seen before include "demonstrate pity" , "Express sympathy" , "Sympathise" .)