Mournful English supporter going over Iowa and California (9)

I believe the answer is:

elegiacal

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

'english supporter going over iowa and california' is the wordplay.
'english supporter' becomes 'eleg' (I can't explain this - if you can you should believe this answer much more).
'going over' is a charade indicator (letters next to each other).
'iowa' becomes 'IA' (standard US state two-letter abbreviation).
'and' says to put letters next to each other.
'california' becomes 'cal' (short for California).
'eleg'+'ia'+'cal'='ELEGIACAL'

Can you help me to learn more?

(Another definition for elegiacal that I've seen is " Wistfully mournful".)

I've seen this clue in The Times.

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