Lower body part: it is not dodgy (5)
I believe the answer is:
legit
'not dodgy' is the definition.
(legitimate)
'lower body part it' is the wordplay.
'lower body part' becomes 'leg' (lower limb).
'leg'+'it'='LEGIT'
'is' is the link.
(Other definitions for legit that I've seen before include "Briefly in accordance with law or rules" , "on the level" , "In accordance with the law (abbr)" , "Authorised" , "Not illegal" .)