One hint left within another? (4)
'one hint' is the definition.
(synonyms)
'left within another?' is the wordplay.
'left within' becomes 'clu' (I can't explain this - if you can you should give a lot more credence to this answer).
'another?' becomes 'e' (I've seen this in other clues).
'clu'+'e'='CLUE'
Can you help me to learn more?
(Other definitions for clue that I've seen before include "It helps solve a crime" , "It helps towards the solution" , "Crossword help" , "Hint, tip" , "Luce (anag.)" .)
'one hint' is the definition.
(thesaurus)
'left within another?' is the wordplay.
'left' becomes 'l' (common abbreviation).
'within' becomes 'in'.
'another?' becomes 'e' (I've seen this in other clues).
'l'+'in'+'e'='LINE'
(Other definitions for line that I've seen before include "Ancestry" , "business" , "Long narrow mark" , "Railway track; policy" , "classified information" .)