Clue: Sweet little boy seen taking the lead (7,4)
Answer: SPOTTED DICK
Explanation: Definition: Sweet
A charade of SPOTTED ('seen') plus DICK ('little boy'), with 'taking the lead' indicating the order of the particles. For those who might think otherwise, SPOTTED DICK is a pudding made of a suet dough (probably now made with a vegetable substitute for suet, ground beef fat) and raisins or currants ('which make the spots), boiled and generally served with custard, in case it does not contain sufficient calories.