Grant right to come between father and ensign (8)
I believe the answer is:
standard
'ensign' is the definition.
(both can mean a flag)
'grant right to come between father and' is the wordplay.
I cannot quite see how this works, but
'right' could be 'ar' (I've seen this in other clues) and 'ar' is found in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for standard that I've seen before include "type of flag" , "Stock - basic - flag" , "possibly rose" , "Conventional" , "Jack" .)