Crossword Genius

The best digger is a card? (3,2,6)

Ross

I believe the answer is:

ace of spades

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

'a card?' is the definition.
(I know that ace of spades is a playing card)

'the best digger' is the wordplay.
I cannot quite see how this works, but
'best' could be 'ace' (ace can informally mean very good) and 'ace' is located in the answer.
'digger' could be 'spade' (I've seen this in another clue) and 'spade' is found within the answer.
This explanation may well be incorrect...

'is' is the link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
Want a hint initially instead of a full solution? Install my app