Limits calorie intake in Madeira, for one (4)
I believe the answer is:
cake
'madeira for one' is the definition.
'limits calorie intake' is the wordplay.
I cannot really understand how this works, but
'calorie' could be 'c' and 'c' is found in the answer.
The remaining letters 'ake' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for cake that I've seen before include "Something cooked" , "Fancy" , "Item of food or soap" , "Piece of soap" , "Set" .)