Wrong about start of clue - work to get a hint (9)
I believe the answer is:
scintilla
'hint' is the definition.
(both can mean a small amount)
'wrong about start of clue work to get a' is the wordplay.
I cannot quite understand how this works, but
'wrong' could be 'ill' (I've seen this in another clue) and 'ill' is found within the answer.
'about' could be 'c' (circa) and 'c' is present in the answer.
'a' is within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for scintilla that I've seen before include "little bit" , "Tiniest bit" , "Tiny hint, trace" , "A tiny bit" , "Slight amount" .)