Garden’s cold, almost shivering in the night air (10)

'the night air' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe there's an association between them I don't understand?

'garden's cold almost shivering' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'shivering' is an anagram indicator.
'gardens'+'cold'='gardenscold'
'gardenscold' with its last letter taken off is 'gardenscol'.
'gardenscol' with letters rearranged gives 'CRADLESONG'.

'in' is the link.

Can you help me to learn more?