A hat for non-inheritable declining hairline? (6)
I believe the answer is:
bonnet
'a hat' is the definition.
(I know this)
'non-inheritable declining hairline?' is the wordplay.
I cannot quite see how this works, but
an anagram of 'non' is 'onn' which is present in the answer.
The remaining letters 'bet' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'for' acts as a link.
Can you help me to learn more?
(Other definitions for bonnet that I've seen before include "Headgear -engine cover" , "Over; mentioned earlier" , "Headwear for a car?" , "Cover for head or engine" , "Hat - American hood" .)