Write directions for pasta (5)
I believe the answer is:
penne
'pasta' is the definition.
(I've seen this before)
'write directions' is the wordplay.
'write' becomes 'pen' ('pen' can be a synonym of 'write').
'directions' becomes 'ne' (I've seen this in other clues**).
'pen'+'ne'='PENNE'
'for' acts as a link.
(Other definitions for penne that I've seen before include "Form of pasta" , "Tube pasta" , "Pasta (in wide tubes)" , "2 [PASTA]" , "Type of pasta" .)