Virtual realm PC creates by expressing time irregularly (10)

I believe the answer is:

cyberspace

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'virtual realm' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'pc creates by expressing time irregularly' is the wordplay.
'expressing' suggests deleting specific letters.
'time' becomes 't' (abbreviation).
'irregularly' indicates anagramming the letters.
'pc'+'creates'+'by'='pccreatesby'
'pccreatesby' with 't' taken away is 'pccreaesby'.
'pccreaesby' with letters rearranged gives 'CYBERSPACE'.

Can you help me to learn more?

(Other definitions for cyberspace that I've seen before include "Virtual 3-D environment" , "Modern concept" , "PC World?" , "whole virtual environment" , "(Computer) virtual reality" .)

I've seen this clue in The Times.

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