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 really understand how this works, but
'wrong' could be 'ill' (I've seen this in another clue) and 'ill' is found in the answer.
'about' could be 'c' (abbreviation for circa) and 'c' is found within the answer.
'a' is found in 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" .)