Playwright calling for lawyer before start of dispute (3,4)

I think it could be either:

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3,4

the bard

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'playwright' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe there's an association between them I don't understand?

'lawyer before start of dispute' is the wordplay.
'lawyer before' becomes 'thebar' (I am not sure about this - if you are sure you should believe this answer much more).
'start of' indicates taking the first letters.
The initial letter of 'dispute' is 'd'.
'thebar'+'d'='THE BARD'

'calling for' acts as a link.

Can you help me to learn more?

(Another definition for the bard that I've seen is " Shakespeare".)

I've seen this clue in The Telegraph.

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