Social rank of clone he reproduced (7)
I believe the answer is:
echelon
'social rank' is the definition.
(I know that echelon is a type of social rank)
'clone he reproduced' is the wordplay.
'reproduced' indicates anagramming the letters (I've seen 'reproduce' mean this).
'clone'+'he'='clonehe'
'clonehe' anagrammed gives 'ECHELON'.
'of' is the link.
(Other definitions for echelon that I've seen before include "Body of troops arranged in a line" , "position in society" , "Military row formation" , "Offset-lines formation" , "Bishops, say" .)