Making a toast to rearing a good child (7,1,5)

I believe the answer is:

raising a glass

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'good child' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'making a toast to rearing a' is the wordplay.
'making a toast' becomes 'glass' (I can't justify this - if you can you should believe this answer much more).
'to' means one lot of letters go next to another (I've seen this in other clues).
'rearing' becomes 'raising' (synonyms).
'raising'+'a'='raisinga'
'glass' after 'raisinga' is 'RAISING A GLASS'.

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

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