Chase away, scatter (6)
I believe the answer is:
dispel
I believe this clue is a double definition.
'chase away' is the first definition.
(synonyms)
'scatter' is the second definition.
(I know that scatter can be written as dispel)
(Other definitions for dispel that I've seen before include "'Dissipate, clear away (6)'" , "Make disappear, doubts perhaps" , "'Disperse, clear away (6)'" , "Blow away, scatter" , "Lisped (anag)" .)