Bachelor in Barking hears Aussie's gas constantly (7)
I believe the answer is:
earbash
'aussie's gas constantly' is the definition.
I can't judge whether this definition defines the answer.
'bachelor in barking hears' is the wordplay.
'bachelor' becomes 'BA' (Bachelor of Arts).
'in' is an insertion indicator.
'barking' indicates an anagram (UK slang for mad).
'hears' with letters rearranged gives 'earsh'.
'ba' going into 'earsh' is 'EARBASH'.
Can you help me to learn more?
(Other definitions for earbash that I've seen before include "Scold" , "go on and on, down-under" , "Talk with" , "rabbit" .)