Point to Sally's dress (5)
I believe the answer is:
equip
'dress' is the definition.
(both can mean to provide someone with something)
'point to sally's' is the wordplay.
'point' becomes 'E' (compass point).
'to sally' becomes 'quip' (both can mean a witty remark).
'e'+'quip'='EQUIP'
(Other definitions for equip that I've seen before include "Give what's needed" , "Furnish with supplies" , "Provide with stock" , "Outfit" , "Sally" .)