Crossword Genius

Rating all the cards, or just some (8)

Ross

I believe the answer is:

deckhand

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

'just some' is the definition.
I can't judge whether this defines the answer.

'rating all the cards' is the wordplay.
'rating all' becomes 'deck' (I can't explain this - if you can you should believe this answer much more).
'the cards' becomes 'hand' (I've seen this in other clues).
'deck'+'hand'='DECKHAND'

'or' acts as a link.

Can you help me to learn more?

(Other definitions for deckhand that I've seen before include "seaman" , "crew member" , "Ship worker" , "one employed on board?" .)

I've seen this clue in The Times.
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