Welcome holding hands after a union (9)
I believe the answer is:
agreement
'union' is the definition.
(I've seen this before)
'welcome holding hands after a' is the wordplay.
I cannot quite see how this works, but
'hands' could be 'men' (synonyms) and 'men' is found within the answer.
'welcome' could be 'greet' (I've seen this before) and 'greet' is present in the leftover letters.
'a' is present in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for agreement that I've seen before include "Accord, contract" , "in sympathy" , "Harmony of opinion" , "concert" , "Correspondence" .)