Hail coming into Massachusetts, occasionally, from the east (6)
I believe the answer is:
accost
'hail' is the definition.
(I know that hail is a more specific form of greet)
'into massachusetts occasionally from the east' is the wordplay.
'into' indicates the answer is hidden within the clue.
'from the east' shows that the letters should be reversed in order (on a map from right to left).
'tsocca' is hidden in the letters of 'massachusetts occasionally'.
'tsocca' backwards is 'ACCOST'.
'coming' is the link.
(Other definitions for accost that I've seen before include "Approach boldly or aggressively" , "Approach boldly or insolently" , "approach with menaces" , "Come up and address" , "Approach and threaten (someone)" .)