It's up North, this style of loaf (3)
I believe the answer is:
tin
'loaf' is the definition.
(I've seen this before)
'it's up north this style' is the wordplay.
'it' becomes ''t' (abbreviation. e.g. in 'tis).
'up north' is a reversal indicator (like on a map - reverse order in down clue).
'this style' becomes 'ni' (I can't explain this - if you can you should believe this answer much more).
'ni' back-to-front is 'in'.
't'+'in'='TIN'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for tin that I've seen before include "Silver-white metal, used to make cans" , "loaf of bread" , "Atomic number 50" , "Silvery-white metal used in cans" , "Canister" .)