Laissez-faire (3)
I believe the answer is:
lax
'laissez-faire' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lax that I've seen before include "Slipshod" , "without tension" , "Flabby" , "Careless or slack" , "Slapdash" .)