Badly need air-drop to be determined beforehand (11)
I believe the answer is:
preordained
'be determined beforehand' is the definition.
(I've seen this before)
'badly need air-drop' is the wordplay.
'badly' indicates anagramming the letters.
'need'+'air'+'drop'='needairdrop'
'needairdrop' with letters rearranged gives 'PREORDAINED'.
'to' is the link.
(Other definitions for preordained that I've seen before include "determined beforehand" , "Already decided" .)