Lift to get to ground level, according to announcement (5)
I believe the answer is:
raise
'lift' is the definition.
(raising is a kind of lifting)
'get to ground level according to announcement' is the wordplay.
'get to ground level' becomes 'raze' (as in razing to the ground).
'according to announcement' shows a homophone (sound like) (as it might sound in an announcement).
'raze' is a homophone of 'RAISE'.
'to' acts as a link.
(Other definitions for raise that I've seen before include "Make greater" , "Exalt" , "Inflate" , "Call up" , "Bring up a salary increase" .)