Prying tool (7)
(Other definitions for crowbar that I've seen before include "Powerful opener" , "one able to afford purchase" , "Burglar's tool, perhaps" , "Heavy iron lever" , "Purchase may be obtained from this" .)
'prying tool' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lever that I've seen before include "Bar operating machinery" , "Exert pressure" , "Purchase from bar" , "Revel (anag.)" , "Rod" .)