To Romeo, he makes an overt change (6)

I believe the answer is:
trevor
'change' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's an association between them I don't understand?
'to romeo he makes an overt' is the wordplay.
I cannot quite understand how this works, but
'romeo' could be 'r' (phonetic alphabet: alpha, bravo, charlie etc.) and 'r' is found in the answer.
an anagram of 'overt' is 'tevor' which is present in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for trevor that I've seen before include "Fellow" , "Chap" , "man" , "Man's name" , "- Howard, English actor (Mutiny on the Bounty)" .)
