Hands in a welcome deal (9)
I believe the answer is:
agreement
'deal' is the definition.
(thesaurus)
'hands in a welcome' is the wordplay.
'hands' becomes 'men' ('men' can be a synonym of 'hands'**).
'in' is an insertion indicator.
'welcome' becomes 'greet' (I've seen this before).
'a'+'greet'='agreet'
'men' going inside 'agreet' is 'AGREEMENT'.
(Other definitions for agreement that I've seen before include "Harmony, concurrence" , "Unlikely result" , "Correspondence" , "deal" , "in sympathy" .)