Crossword Genius

Receive support then arrive at Mar El Lago (4,2,6)

Ross

I believe the answer is:

turn up trumps

I'm a little stuck... Click here to teach me more about this clue!

'receive support' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'arrive at mar el lago' is the wordplay.
I cannot really see how this works, but
'arrive' could be 'turnup' (I've seen this in another clue) and 'turnup' is found in the answer.
The remaining letters 'trumps' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

'then' acts as a link.

Can you help me to learn more?

(Other definitions for turn up trumps that I've seen before include "In whist, you will have to" , "be especially helpful" , "behave unexpectedly generously" , "In bezique, one must" .)

I've seen this clue in the Sydney Morning Herald.
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