The Dane is likely to miss the game with Reading after being knocked unconscious against Sheffield Wednesday.
Clarke, on the other hand, started at Hillsborough playing in right midfield and his versatility down that flank stands him in good stead in the eyes of Smith.
The head coach said: “If Henrik isn't available then Josh Clarke is one who is going to compete for the right back slot.
“It's useful to have someone who is able to play in more than one position as we've got an injury problem maybe with Henrik.
“It's good to have that polyfilla player when you need it. He came on for Sergi Canos and did ever so well against Villa and did well in the first half at Sheffield Wednesday.”
Clarke and Dalsgaard, who has also played further forward in his career, worked together nicely at Aston Villa and Sheffield Wednesday and Smith likes the pairing, especially with Canos set to be absent for the next month.
Smith added: “With Josh Clarke's pace it's hard to get around the outside of him. Henrik backed him up more and let him go one v one with people. You saw a good display from both players.”
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