Desperately determined to create opening using board game accessory (7)

I believe the answer is:

doordie

I'm a little stuck... Click here to teach me more about this clue!

'desperately determined to' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'opening using board game accessory' is the wordplay.
'opening' becomes 'door' (a door is an opening).
'using' says to put letters next to each other.
'board game accessory' becomes 'die' (I can't justify this - if you can you should give a lot more credence to this answer).
'door'+'die'='DOORDIE'

'create' is the link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

Want a hint initially instead of a full solution? Install my app