Reach out and be inclined to go after former partner (6)
I believe the answer is:
extend
'reach out' is the definition.
(synonyms)
'be inclined to go after former partner' is the wordplay.
'be inclined' becomes 'tend' (synonyms).
'to go after' says to put letters next to each other.
'former partner' becomes 'ex'.
'tend' put after 'ex' is 'EXTEND'.
'and' is the link.
(Other definitions for extend that I've seen before include "Carry on" , "Stretch out, say the hand of friendship" , "Enlarge, widen" , "Provide challenge" , "Reach out or stretch" .)