Sporting trial includes children's game: come on, young lady! (8)

I believe the answer is:

attagirl

'come on young lady' is the definition.
('attagirl' might be shouted to encourage a woman)

'sporting trial includes children's game' is the wordplay.
'sporting' indicates an anagram.
'includes' indicates putting letters inside.
'children's game' becomes 'tag' (I've seen this before).
'trial' anagrammed gives 'atirl'.
'atirl' placed around 'tag' is 'ATTAGIRL'.

(Another definition for attagirl that I've seen is " A word of encouragement".)

I've seen this clue in The Guardian.

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