Greek leg-end in Greek legend? (8,4)
I believe the answer is:
achilles heel
'greek legend?' is the definition.
The definition suggests a singular noun which matches the answer.
'greek leg-end' is the wordplay.
I cannot really see how this works, but
'greek' could be 'achilles' (I have seen 'Famous Greek' mean 'achilles' so perhaps 'greek' could also mean 'achilles') and 'achilles' is found in the answer.
'end' could be 'heel' (heel can mean the end of something) and 'heel' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for achilles heel that I've seen before include "A chink in the armour" , "Personal weak spot" , "Vulnerable part" , "Person's vulnerable weakness" , "One's most vulnerable spot" .)