Proprietor or new director? (5)
I believe the answer is:
owner
'proprietor' is the definition.
(synonyms)
'or new director?' is the wordplay.
'or new' anagrams to 'OWNER'.
However, I'm not sure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for owner that I've seen before include "landlord" , "Title-holder" , "Keeper" , "possessive type" , "Holder, possessor" .)