Misguidedly ask Hector for a biscuit (9)
I believe the answer is:
shortcake
'a biscuit' is the definition.
(shortcake is a kind of biscuit)
'misguidedly ask hector' is the wordplay.
'misguidedly' indicates anagramming the letters.
'ask'+'hector'='askhector'
'askhector' with letters rearranged gives 'SHORTCAKE'.
'for' acts as a link.
(Other definitions for shortcake that I've seen before include "Rich biscuit; American dessert" , "Sweet biscuit - rat chokes (anag)" , "pastry?" , "Rate shock (anag)" , "Crisp, rich, crumbly, buttery biscuit" .)