Mocking of US lawman briefly and familiarly rock band does live (8)

'mocking of us lawman briefly' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'and familiarly rock band does live' is the wordplay.
I cannot quite see how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is found within the answer.
'band' could be 'o' (I've seen this in other clues) and 'o' is present in the answer.
'does live' could be 'is' ('be' can be a synonym of 'live') and 'is' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?