Crossword Genius

To sum up about computers etc, lately disheartened to a great extent (10)

Ross

I believe the answer is:

infinitely

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'to sum up about computers etc' is the definition.
I can't judge whether this definition defines the answer.

'lately disheartened to a great extent' is the wordplay.
'disheartened' suggests removing the centre (the middle or heart is removed).
'to a' means one lot of letters go next to another (I've seen this in other clues).
'great extent' becomes 'infinite' (I can't justify this - if you can you should give a lot more credence to this answer).
'lately' with its centre removed is 'ly'.
'ly' after 'infinite' is 'INFINITELY'.

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I've seen this clue in The Times.
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