A diver, having changed, was not the same (6)
I believe the answer is:
varied
'not the same' is the definition.
(I've seen this in another clue)
'a diver having changed' is the wordplay.
'having changed' indicates an anagram.
'a'+'diver'='adiver'
'adiver' anagrammed gives 'VARIED'.
'was' acts as a link.
(Other definitions for varied that I've seen before include "Widely different" , "Of different sorts, diverse" , "Assorted, diverse" , "Motley" , "(Of selection) showing a number of types" .)