Strangers without right spades (9)

I believe the answer is:

outsiders

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

'strangers' is the definition.
(outsider is a kind of stranger)

'without right spades' is the wordplay.
'without' becomes 'outside' (I've seen this before).
'right spades' becomes 'rs' (this might be a standard abbreviation which I don't know about).
'outside'+'rs'='OUTSIDERS'

Can you help me to learn more?

(Another definition for outsiders that I've seen is " Competitors or horses with little chance of winning - not in the club".)

I've seen this clue in The Daily Express.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.