A base got wrecked in deliberate act of destruction (8)
I believe the answer is:
sabotage
'deliberate act of destruction' is the definition.
(I've seen this before)
'a base got wrecked' is the wordplay.
'wrecked' indicates anagramming the letters.
'a'+'base'+'got'='abasegot'
'abasegot' anagrammed gives 'SABOTAGE'.
'in' acts as a link.
(Other definitions for sabotage that I've seen before include "cripple" , "Wreck" , "Deliberate damage (eg, in wartime)" , "Disrupt" , "Deliberate and malicious destruction" .)