Postpone outlay to accommodate American (7)
I believe the answer is:
suspend
'postpone' is the definition.
(suspending is a kind of postponing)
'outlay to accommodate american' is the wordplay.
'outlay' becomes 'spend' (I've seen this before).
'to accommodate' indicates putting letters inside.
'american' becomes 'us'.
'spend' enclosing 'us' is 'SUSPEND'.
(Other definitions for suspend that I've seen before include "Bar temporarily" , "Keep in abeyance" , "Delay" , "Carry out hanging" , "Hold up or dangle" .)