Question Author
Thank you Jim F for trying to resolve my query.
Clubs, in bridge, is actually the WEAKEST of the four suits (Spades, Hearts, Diamonds and Clubs in descending order), which means "clubs perhaps" should not be identified as the Definition. I believe the intended Definition is actually "Good case" and that Strong Suit is poor wordplay. I also don't think it is reasonable to suggest "suit" is synonymous with case.
All in all, I just think it's a poor clue - but thank you for at least for eventually attempting to answer my question.