Greta at disorderly race meeting (7)

I believe the answer is:

regatta

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'race meeting' is the definition.
'regatta' can be an answer for 'meeting' (I've seen this before). I'm not sure about the 'race' bit.

'greta at disorderly' is the wordplay.
'disorderly' is an anagram indicator.
'greta'+'at'='gretaat'
'gretaat' with letters rearranged gives 'REGATTA'.

Can you help me to learn more?

(Other definitions for regatta that I've seen before include "Number of yachts in sporting event" , "races at sea" , "Boat race meeting" , "Rowing or sailing event" , "Series of boat races" .)

I've seen this clue in The Telegraph.

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