Imprecise — loose (6)
I believe the answer is:
sloppy
This clue is a double definition.
'imprecise' is the first definition.
(thesaurus)
'loose' is the second definition.
(thesaurus)
(Other definitions for sloppy that I've seen before include "Careless and messy" , "Mawkish" , "Careless; watery" , "'Careless, shoddy (6)'" , "maudlin" .)