Meld (5)
'meld' is the definition.
(uniting is a kind of melding)
This is all the clue.
(Other definitions for unite that I've seen before include "Join forces" , "Get together" , "Pull together" , "Come together as allies or comrades" , "Gather together as one" .)
'meld' is the definition.
(I know that meld can be written as merge)
This is all the clue.
(Other definitions for merge that I've seen before include "Join, blend" , "Combine, coalesce" , "Mix" , "Make one" , "Amalgamate" .)
'meld' is the definition.
(I know that fuse is a action)
This is the entire clue.
(Other definitions for fuse that I've seen before include "'Blend, merge (4)'" , "Melt; ignition device" , "Safety device in circuit" , "Safeguard in electrical circuit" , "Join or blend to form an entity" .)