We may bet on them to give us hydrogen (10)

I believe the answer is:

greyhounds

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'we may bet on them' is the definition.
I can't tell whether this defines the answer.

'give us hydrogen' is the wordplay.
'give' indicates an anagram (I've seen 'giving' mean this (the letters give the letters for another word)).
'us'+'hydrogen'='ushydrogen'
'ushydrogen' is an anagram of 'GREYHOUNDS'.

'to' acts as a link.

Can you help me to learn more?

(Another definition for greyhounds that I've seen is " Dogs bred for racing".)

I've seen this clue in The Globe and Mail.

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