Handle the outing (5)

I believe the answer is:

This clue is a double definition.

'handle' is the first definition.
(I know that handle can be written as treat)

'the outing' is the second definition.

(Other definitions for treat that I've seen before include "Tetra (anag.)" , "Deal with - source of great pleasure" , "Care for - pay the bill" , "Handle - pleasure given" , "pleasant surprise" .)

I've seen this clue in the Evening Standard.

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