Tot getting hint in part of index, perhaps (9)
I believe the answer is:
fingertip
'index perhaps' is the definition.
The definition and answer can be both body parts as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'tot getting hint in' is the wordplay.
'tot' becomes 'finger' (both are small amounts of alcohol).
'getting' means one lot of letters go next to another.
'hint in' becomes 'tip' (synonyms. I am not sure about the 'in' bit.).
'finger'+'tip'='FINGERTIP'
'part of' acts as a link.
Can you help me to learn more?
(Other definitions for fingertip that I've seen before include "One's used to feel" , ""hunt the thimble" location in the end?" , "Pointer" , "at which things are very familiar" , "Digital extremity" .)