I think it means that a string on the harp would break.Sorry, dear, but there is hardly
noany context. It's a play by Beckett and character just utter sentences with no apparent connection...
Dora used to say, the days I hadn't earned enough, You and your harp! You'd do better crawling on all fours, with your father's medals pinned to your arse and a money box round your neck. You and your harp! Who do you think you are? And she made me sleep on the floor. [Pause.] Who I thought I was [Pause.] Ah that. . . I never could... [Pause. He gets up.] Never could.. . [He starts groping again for his stool, halts, listens.] If I listened long enough I'd hear it, a string would give.
Yes, or possibly that rather than breaking, the string just lost tension, making a sound? If, say, structural steel 'gives', it can just bend rather than breaking.I think it means that a string on the harp would break.