In Verdun Clemenceau has a relative (5)
I believe the answer is:
uncle
'a relative' is the definition.
(uncle is a kind of relative)
'in verdun clemenceau has' is the wordplay.
'has' indicates the answer is hidden within the clue.
'UNCLE' is hidden in the letters of 'in verdun clemenceau'.
(Other definitions for uncle that I've seen before include "Sam, perhaps" , "For example, Tom Cobbleigh" , "One receiving pawn" , "takes the pledge" , "Dad's brother" .)