Buzzer’s out, working basically; else scream (6)

I believe the answer is:

bellow

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'else scream' is the definition.
'bellow' can be an answer for 'scream' (bellowing is a kind of screaming). I am unsure of the 'else' bit.

'buzzer's out working basically' is the wordplay.
'buzzer' becomes 'bell' (synonyms).
'basically' indicates taking the first letters (the first letter could be its root or base).
The initial letters of 'out working' is 'ow'.
'bell'+'ow'='BELLOW'

Can you help me to learn more?

(Other definitions for bellow that I've seen before include "Shout; Saul --, novelist" , "author" , "Yell" , "Roar like a bull" , "Loud cry of a bull" .)

I've seen this clue in The Hindu.

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