Put off Sally, perhaps, having a dizzy head (5)
I believe the answer is:
daunt
'put off' is the definition.
(I've seen this in another clue)
'sally perhaps having a dizzy head' is the wordplay.
I cannot really see how this works, but
'sally' could be 'aunt' (Aunt Sally, traditional game) and 'aunt' is present in the answer.
A single letter 'd' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for daunt that I've seen before include "Discourage" , "Make (someone) apprehensive" , "Cause to feel intimidated" , "Frighten, intimidate" , "Cow" .)