Others, almost packed, relaxing (7)
I believe the answer is:
restful
'relaxing' is the definition.
(I know that relaxing can be written as restful)
'others almost packed' is the wordplay.
'others' becomes 'rest' (eg the rest of a group).
'almost' means to remove the last letter (most of the word but not all of it).
'packed' becomes 'full' (synonyms).
'full' with its last letter taken away is 'ful'.
'rest'+'ful'='RESTFUL'
(Other definitions for restful that I've seen before include "Soothing is required" , "Tranquil - fluster (anag)" , "Sedative" , "Relaxing" , "Calm" .)