Home County mostly moved coal and tin given to rebellion (14)

I believe the answer is:

insurrectional

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'home county mostly moved coal' is the definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I don't see?

'tin given to rebellion' is the wordplay.
'tin given' becomes 'al' (I can't explain this - if you can you should give a lot more credence to this answer).
'to' says to put letters next to each other (I've seen this in other clues).
'rebellion' becomes 'insurrection' (synonyms).
'al' after 'insurrection' is 'INSURRECTIONAL'.

'and' acts as a link.

Can you help me to learn more?

I've seen this clue in The Independent.

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