Standard issue for a rector (6)
I believe the answer is:
parson
'a rector' is the definition.
('parson' can be a synonym of 'rector')
'standard issue' is the wordplay.
'standard' becomes 'par' (I've seen this before).
'issue' becomes 'son' (issue can mean someone's offspring).
'par'+'son'='PARSON'
'for' acts as a link.
(Other definitions for parson that I've seen before include "One with benefice" , "Churchman" , "Anglican clergyman" , "A rector or vicar" , "Rector; clergyman" .)