Joker finally in euphoric state, as the Marx Brothers were (7)

I believe the answer is:

'as the marx brothers were' is the definition.

'joker finally in euphoric state' is the wordplay.
'finally' suggests the final letters.
'in euphoric state' becomes 'elated'.
The last letter of 'joker' is 'r'.
'r'+'elated'='RELATED'

(Other definitions for related that I've seen before include "Father and son have to be" , "Like family members" , "Told in detail, being connected" , "within family" , "Agnate" .)

I've seen this clue in The Times.

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