Stray from prior view, occasionally (4)
I believe the answer is:
rove
'stray' is the definition.
(I know that stray can be written as rove)
'prior view occasionally' is the wordplay.
'occasionally' indicates alternate letters (letters taken at regular intervals or occasions).
'prior'+'view'='priorview'
The alternate letters of 'priorview' are 'ROVE'.
'from' acts as a link.
(Other definitions for rove that I've seen before include "Range" , "Move aimlessly about" , "Roam about aimlessly" , "Ramble, roam, wander" , "Don't stay in one place" .)