The Boy Who Cried Wolf ... Stuart perhaps? (5,9)
I believe the answer is:
young pretender
'the boy who cried wolf stuart perhaps?' is the definition.
The definition suggests a singular noun which matches the answer.
'the boy' is the wordplay.
I cannot really understand how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
'boy' could be 'der' and 'der' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for young pretender that I've seen before include "One who wanted throne" , "child actor?" , "Darling Charlie" , "Grandson of James II" , "Bonnie Prince Charlie" .)