The normal play in the trump suit missing ♠ K74 is to finesse.
If the finesse loses you’ll need to make a good guess in the club suit.
But there’s a better way whereby you can avoid any guess whenever the trumps break 2-1.
Play ♠ A followed by three rounds of hearts and diamonds.
You then exit with a ♠ and the defense have to open up the clubs or give a ruff and discard.