Well-known mail-fair was redesigned (8)
I believe the answer is:
familiar
'well-known' is the definition.
(similar in meaning)
'mail-fair was redesigned' is the wordplay.
'mail-fair' anagrams to 'FAMILIAR'.
But, I'm unsure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for familiar that I've seen before include "Well-known, easily recognisable" , "Everyday; recognisable" , "spirit" , "Witch's cat is well acquainted" , "forward" .)