Engineer's wide corner (6)
I believe the answer is:
wangle
'engineer's' is the definition.
(I've seen this before)
'wide corner' is the wordplay.
'wide' becomes 'w' (abbreviation e.g. in cricket).
'corner' becomes 'angle' (eg a corner of a shape).
'w'+'angle'='WANGLE'
(Other definitions for wangle that I've seen before include "Acquire by devious means" , "Obtain (something) by manipulation" , "Bring about by scheming" , "Obtain by being persuasive" , "Use craft to get" .)