Maybe anger in a boozer leads to broadside (7)
I believe the answer is:
barrage
'to broadside' is the definition.
(thesaurus)
'maybe anger' is the wordplay.
'maybe' becomes 'bar' (I can't explain this - if you can you should give a lot more credence to this answer).
'anger' becomes 'rage' (rage is a kind of anger).
'bar'+'rage'='BARRAGE'
'in a boozer leads' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for barrage that I've seen before include "Artificial obstruction in a river" , "Heavy artillery fire" , "Continuous artillery fire" , "prolonged attack" , "flood protection" .)