Silly urge in me for cake (8)
I believe the answer is:
meringue
'cake' is the definition.
(I have seen 'Sugary cake ' mean 'meringue' so perhaps 'cake' could also mean 'meringue')
'silly urge in me' is the wordplay.
'silly' indicates an anagram.
'urge'+'in'+'me'='urgeinme'
'urgeinme' with letters rearranged gives 'MERINGUE'.
'for' acts as a link.
(Other definitions for meringue that I've seen before include "Sweet topping for pies etc" , "a really sweet item" , "Egg-based treat" , "Confection of beaten egg white and sugar" , "Sugary confection" .)