What might make a full house from pack? Run following suit (5-7)

'what might make a full house' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'pack? run following suit' is the wordplay.
I cannot quite understand how this works, but
'pack?' could be 'crowd' (packing is a kind of crowding) and 'crowd' is found in the answer.
'run' could be 'r' (cricket abbreviation) and 'r' is located in the answer.
'suit' could be 'please' (I've seen this in another clue) and 'please' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

'from' is the link.

Can you help me to learn more?