Address grand with swaying tree (5)
I believe the answer is:
greet
'address' is the definition.
(I know that greet is a more specific form of the action address)
'grand with swaying tree' is the wordplay.
'grand' becomes 'g' (G is short for grand as in a thousand).
'with' means one lot of letters go next to another.
'swaying' indicates anagramming the letters (letters swaying or moving around).
'tree' with letters rearranged gives 'reet'.
'g'+'reet'='GREET'
(Other definitions for greet that I've seen before include "Welcome (someone)" , "Welcome; cry (Scots)" , "Acknowledge" , "Receive - salute" , "Receive (someone)" .)