Student tucking into hot bread (7)
I believe the answer is:
stollen
'bread' is the definition.
(I've seen this before)
'student tucking into hot' is the wordplay.
'student' becomes 'L' (learner, as in L-plates for learner drivers).
'tucking into' is an insertion indicator.
'hot' becomes 'stolen' (eg stolen goods are 'hot').
'l' placed into 'stolen' is 'STOLLEN'.
(Other definitions for stollen that I've seen before include "Rich German fruit and nut loaf" , "German bread" , "Traditional German cake for Christmas" .)