The underworld can possibly cause consternation (6)

I believe the answer is:

dismay

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'cause consternation' is the definition.
'dismay' can be an answer for 'consternation' (synonyms). I'm not certain of the 'cause' bit.

'the underworld can' is the wordplay.
'the underworld' becomes 'dis' (underworld in classical mythology).
'can' becomes 'may' (synonyms).
'dis'+'may'='DISMAY'

'possibly' is the link.

Can you help me to learn more?

(Other definitions for dismay that I've seen before include "Disquiet or shock" , "Consternation, trepidation" , "Disappointment" , "Concern and distress at something unexpected" , "trouble" .)

I've seen this clue in The Irish Independent.

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