Tailor main coat about the body (8)
I believe the answer is:
anatomic
'about the body' is the definition.
(I've seen this in another clue)
'tailor main coat' is the wordplay.
'tailor' is an anagram indicator (letters tailored or designed).
'main'+'coat'='maincoat'
'maincoat' with letters rearranged gives 'ANATOMIC'.
(Other definitions for anatomic that I've seen before include "Relating to bodily structure" , "Relating to body structure" , "Studying the structure of people" , "associated with a body" .)