Call for rapid movement over Brexit problem? (5,3)
I believe the answer is:
trade gap
'brexit problem?' is the definition.
'call for rapid movement over' is the wordplay.
'call for' becomes 'page' (to page is to call with a pager).
'rapid movement' becomes 'dart'.
'over' is a reversal indicator.
'page'+'dart'='pagedart'
'pagedart' written backwards gives 'TRADE GAP'.
(Other definitions for trade gap that I've seen before include "Import-export concern" , "Economic deficit" , "negative balance" , "Import value minus export value" , "Excess of imports over exports" .)