Something from Pret in Kentish Town? (8)
I believe the answer is:
sandwich
'kentish town?' is the definition.
(Sandwich is a town in Kent)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for sandwich that I've seen before include "Snack; sponge cake" , "Quick snack" , "Golf club" , "Snack with bread" , "Layered sponge cake" .)