Drunk on broadcast having no weak point (8)
I believe the answer is:
airtight
'having no weak point' is the definition.
I can't tell whether this defines the answer.
'drunk on broadcast' is the wordplay.
'drunk' becomes 'tight' (I've seen this before).
'on' is a charade indicator (letters next to each other).
'broadcast' becomes 'air' (synonyms).
'tight' put after 'air' is 'AIRTIGHT'.
Can you help me to learn more?
(Other definitions for airtight that I've seen before include "Impenetrable" , "beyond question" , "Not allowing gas to enter or escape" , "Hermetically sealed" , "(Of a defence) having no weaknesses" .)