Surprisingly gain lumber trade in place of what's disappeared? (7,8)
I believe the answer is:
bermuda triangle
'place of what's disappeared?' is the definition.
(region where vehicles famously disappear)
'surprisingly gain lumber trade' is the wordplay.
'surprisingly' indicates anagramming the letters.
'gain'+'lumber'+'trade'='gainlumbertrade'
'gainlumbertrade' with letters rearranged gives 'BERMUDA TRIANGLE'.
'in' is the link.
(Other definitions for bermuda triangle that I've seen before include "notorious danger area?" , "Area of mystery" , "Place where ships have been mysteriously lost" , "mysterious place" , "associated with disappearing craft?" .)