Crossword Genius

Should this dodgy agency also sell spades? (6,4)

Ross

I believe the answer is:

bucket shop

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

'should this dodgy agency' is the definition.
The definition suggests a singular noun which matches the answer.

'sell spades?' is the wordplay.
I cannot quite see how this works, but
'sell' could be 'shop' (I've seen this before) and 'shop' is present in the answer.
The remaining letters 'bucket' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

'also' acts as a link.

Can you help me to learn more?

(Other definitions for bucket shop that I've seen before include "Unreliable selling outlet" , "Source of cheap airline tickets" , "Having supplier of tickets" , "Agency selling cheap airline tickets" , "unreliable agency" .)

I've seen this clue in The Times.
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