Dodgy behaviour? (7)
I believe the answer is:
evasion
'dodgy behaviour?' is the definition.
(evading something is dodging or avoiding it)
This is the entire clue.
(Other definitions for evasion that I've seen before include "Illegal avoidance (of tax)" , "A dodgy answer or excuse" , "Avoidance; equivocation" , "attempt to withhold truth?" , "Act of avoiding" .)