Catch on (5 letters)

"___ Go the Boats?": R.L.S. (5 letters)

Support payment query? (15 letters)

"___ up, Doc?" (5 letters)

___ supra (3 letters)

Troubles (4 letters)

Response: Abbr. (3 letters)

Problem or model (5 letters)

"Huh?" (4 letters)