Chance a noted clinic for reconstructive work (12)
I believe the answer is:
coincidental
'chance' is the definition.
(as in a chance encounter)
'a noted clinic for reconstructive work' is the wordplay.
'a noted clinic' anagrams to 'COINCIDENTAL'.
Though, I am unsure how this is indicated.
Can you help me to learn more?
(Other definitions for coincidental that I've seen before include "Happening at the same time" , "fortuitous" , "Occurring together" , "Happening together but without connection" , "Apparently randomly concurrent" .)