Call placed primarily for digital currency (6)

I believe the answer is:

crypto

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'digital currency' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'call placed primarily for' is the wordplay.
'call' becomes 'cry' (as in a bird's call).
'primarily' indicates taking the first letters.
'for' becomes 'to' (eg both can mean 'in the opinion of').
The first letter of 'placed' is 'p'.
'cry'+'p'+'to'='CRYPTO'

Can you help me to learn more?

(Other definitions for crypto that I've seen before include "closet" , "Prefix denoting hidden or obscure" .)

I've seen this clue in The Times.

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