Beat, put sale off (7)
I believe the answer is:
pulsate
'beat' is the definition.
(I know that beat can be written as pulsate)
'put sale off' is the wordplay.
'off' indicates anagramming the letters.
'put'+'sale'='putsale'
'putsale' with letters rearranged gives 'PULSATE'.
(Other definitions for pulsate that I've seen before include "Expand and contract regularly" , "Throb regularly like heart" , "thrill" , "Produce a regular throbbing sensation" .)