Orders cheese for starter (5)
I believe the answer is:
brief
'orders' is the definition.
(instructions given to someone doing a job or task)
'cheese for starter' is the wordplay.
'cheese' becomes 'brie' (Brie is an example).
'starter' says to take the initial letters.
The initial letter of 'for' is 'f'.
'brie'+'f'='BRIEF'
(Other definitions for brief that I've seen before include "Fibre (anag.)" , "Document stating the facts of a legal case" , "Barrister (sl.)" , "description of Macbeth's candle" , "Provide someone with the facts of the case" .)