Secret spilled about opening of 'Phantom' and 'Ghost'? (7)

I believe the answer is:

spectre

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'and ghost'?' is the definition.
I can't tell whether this defines the answer.

'secret spilled about opening of phantom' is the wordplay.
'spilled' indicates anagramming the letters.
'about' indicates putting letters inside.
'opening of' suggests taking the first letters.
The first letter of 'phantom' is 'p'.
'secret' with letters rearranged gives 'sectre'.
'sectre' enclosing 'p' is 'SPECTRE'.

Can you help me to learn more?

(Other definitions for spectre that I've seen before include "Sceptre (anag.)" , "'Phantom, shade (7)'" , "something seen as a threat" , "Enemy organisation for James Bond; ghost" , "Respect for a ghost" .)

I've seen this clue in The Telegraph.

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