Nervous Hit Meaning

(theater, idiomatic, English) A production which receives generally favorably notice, but is not assured of success.

Example: But it hardly mattered; her singing (including "My Own Best Friend" made into a solo) and performing were so strong that few quibbled, especially as she was accomplishing a valiant task by selling out a new, somewhat nervous hit while its regular star recovered. — Ken Mandelbaum in The Insider