Dashed hope upset proof-reader for The Sun? (7)

I believe the answer is:

phoebus

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'the sun?' is the definition.
(I've seen this before)

'dashed hope upset proof-reader' is the wordplay.
'dashed' is an anagram indicator.
'upset proof reader' becomes 'bus' (I can't justify this - if you can you should believe this answer much more).
'hope' with letters rearranged gives 'phoe'.
'phoe'+'bus'='PHOEBUS'

'for' is the link.

Can you help me to learn more?

(Other definitions for phoebus that I've seen before include "Forename of Apollo" , "Greek sun god" .)

I've seen this clue in The Times.

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