A course of primarily freshly baked potato on top of ham (8)
I believe the answer is:
footpath
'a course' is the definition.
(I've seen this before)
'primarily freshly baked potato on top of ham' is the wordplay.
'primarily' suggests taking the first letters.
'baked' is an anagram indicator.
'on top of' indicates taking the first letters (I've seen 'on top' mean this).
The initial letter of 'freshly' is 'f'.
The initial letter of 'ham' is 'h'.
'potato' is an anagram of 'ootpat'.
'f'+'ootpat'+'h'='FOOTPATH'
'of' acts as a link.
(Other definitions for footpath that I've seen before include "Step this way" , "Way for pedestrians beside road" , "Pedestrian right of way" , "means of access?" , "Countryside right of way" .)