Measurement right? Wrong! (5)
I believe the answer is:
girth
'measurement' is the definition.
(thesaurus)
'right? wrong' is the wordplay.
'wrong' is an anagram indicator.
'right' with letters rearranged gives 'GIRTH'.
(Other definitions for girth that I've seen before include "Body's circumference around the middle" , "Distance round the middle" , "Size of waist perhaps" , "all the way round" , "Measure all round" .)