Standard fit for moral tale (7)
I believe the answer is:
parable
'moral tale' is the definition.
(tale with a moral or lesson)
'standard fit' is the wordplay.
'standard' becomes 'par' (standard of play in golf).
'fit' becomes 'able' (similar in meaning).
'par'+'able'='PARABLE'
'for' is the link.
(Other definitions for parable that I've seen before include "Sower, for one" , "Moral-carrying story" , "scripture lesson" , "Leap bar poorly for a biblical story" , "Bible story" .)