Partially agree to welcome (5)
I believe the answer is:
greet
'welcome' is the definition.
(I've seen this before)
'partially agree to' is the wordplay.
'partially' says the answer is hidden in the clue.
'GREET' can be found hidden inside 'agree to'.
(Other definitions for greet that I've seen before include "Say hello, hail" , "Acknowledge" , "Give welcome to" , "Make welcome" , "Welcome (someone)" .)