Destroy in the rush to get promoted? (4,2)
I believe the answer is:
tear up
'destroy' is the definition.
(I've seen this in another clue)
'rush to get promoted?' is the wordplay.
'rush' becomes 'tear' (tear is a kind of rush).
'to get' is a charade indicator (letters next to each other).
'promoted?' becomes 'up' (moving up).
'tear'+'up'='TEAR UP'
'in the' is the link.
(Other definitions for tear up that I've seen before include "Rip to pieces" , "Pull to pieces" , "Rip apart" , "To shred" .)