An incomplete request for dummy to play a card. If declarer names only the suit, dummy must play the lowest card in the suit. If declarer names only the rank, dummy must play the card from the same suit as last led.
For example, if dummy holds A-9-4-2 of spades and declarer says ‘spade’, dummy plays the ♠2. If on the next trick, declarer says ‘nine’, dummy plays the ♠9.