Asian ready to call colossus hides a note (7)
I believe the answer is:
ringgit
'asian ready' is the definition.
(currency of Malaysia - ready can mean cash)
'call colossus hides a note' is the wordplay.
I cannot really see how this works, but
'call' could be 'ring' (telephone call) and 'ring' is located in the answer.
'note' could be 'g' (musical note) and 'g' is located in the answer.
The remaining letters 'it' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'to' acts as a link.
(Other definitions for ringgit that I've seen before include "capital of Malaysia" , "Standard monetary unit of Malaysia" , "Ready in Kuala Lumpur" , "Malaysian currency" , "Asian cash" .)