Rudest, unfairly, to the novice making pastry (7)
I believe the answer is:
strudel
'pastry' is the definition.
(strudel is a kind of pastry)
'rudest unfairly to the novice' is the wordplay.
'unfairly' is an anagram indicator (I've seen this in other clues).
'to the novice' becomes 'l' (abbreviation for Learner e.g. on UK cars).
'rudest' is an anagram of 'strude'.
'strude'+'l'='STRUDEL'
'making' is the link.
(Other definitions for strudel that I've seen before include "Germany pastry" , "Pastry with filling (usually apple)" , "Rustled (anag.)" , "Dessert of thin pastry filled with fruit" , "Baked dish" .)