Extremely agreeable concession for one who told tales (5)
I believe the answer is:
aesop
'one who told tales' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'extremely agreeable concession' is the wordplay.
'extremely' suggests removing the centre (only the extremes of the word are used).
'concession' becomes 'sop' (sop is a kind of concession).
'agreeable' with its centre taken out is 'ae'.
'ae'+'sop'='AESOP'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for aesop that I've seen before include "A pose by Greek writer of fables" , "Greek storyteller" , "fabulous figure?" , "classic author" , "he wrote in Greek" .)