Bent on being under canvas? (6)
I believe the answer is:
intent
I believe this is a double definition.
'bent on' is the first definition.
(thesaurus)
'under canvas?' is the second definition.
(I've seen this in other clues)
'being' is the link.
(Other definitions for intent that I've seen before include "Determined or resolved" , "With mind fixed on purpose, concentrated" , "Purpose under canvas" , "'Engrossed, absorbed (6)'" , "Resolved; purpose" .)