Shock as pop falls oddly (5)

I believe the answer is:

appal

'shock' is the definition.
('appal' can be a synonym of 'shock')

'as pop falls oddly' is the wordplay.
'oddly' indicates alternate letters.
'as'+'pop'+'falls'='aspopfalls'
The alternating letters of 'aspopfalls' are 'APPAL'.

(Other definitions for appal that I've seen before include "Greatly horrify" , "Scandalise" , "Greatly dismay" , "Petrify" , "Disgust" .)

I've seen this clue in The Independent.

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