26 across
Harp
on
after
lady
loses
heart
(4)
Harp on after lady loses heart (4)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Harp — another stringed instrument. Take LADY and remove its heart (the middle letters, AD) to leave LY, then add RE (meaning "on" or "about") after it, and you've got your answer.