Winter is here in no time – it’s disappointing (5,5)

'winter is here' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'no time it's disappointing' is the wordplay.
I cannot quite understand how this works, but
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is located in the answer.
'time' could be 'hr' (I've seen this in other clues) and 'hr' is found within the remaining letters.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found in the answer.
This may be the basis of clue (or it may be nonsense).

'in' is the link.

Can you help me to learn more?