Food! Food for the pin-ups! (10)
I believe the answer is:
cheesecake
'food' is the definition.
(cheesecake is a kind of food)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for cheesecake that I've seen before include "Dessert food" , "Rich sweet tart" , "Creamy tart" , "Provocative girls" , "Sexy female photographs - rich sweet" .)