I haven't seen any discussion(s) regarding how to play suit combinations to create/deny entries.
If we need to see the whole hand to appreciate the play, please don't refrain from adding it.
If we can also discuss those from the point of view of defense, that would be great.
Here is one:
It is known that RHO has the ♠A. You need to create an entry to dummy (North) in spades.
How will you play this combination? Can defense do anything to deny you the entry?

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West Leads ♥ 7