Less common to pursue fine food (6)
I believe the answer is:
fodder
'food' is the definition.
(fodder is a kind of food)
'less common to pursue fine' is the wordplay.
'less common' becomes 'odder' (I've seen this in another clue).
'to pursue' is a charade indicator (letters next to each other).
'fine' becomes 'f' (abbreviation in pencil classifications).
'odder' put after 'f' is 'FODDER'.
(Other definitions for fodder that I've seen before include "Food for animals" , "Food for livestock" , "Lucerne etc" , "Dried food like hay for horses" , "Straw to eat" .)