Serving, give up point and play without purpose (7,3,5)
I believe the answer is:
waiting for godot
'play without purpose' is the definition.
(existentialist play by Samuel Beckett)
'serving give up point' is the wordplay.
'serving' becomes 'waiting' (working as a waiter or server).
'give up' becomes 'forgo' (to forgo something is to give it up).
'point' becomes 'dot' (synonyms).
'waiting'+'forgo'+'dot'='WAITING FOR GODOT'
'and' is the link.
(Other definitions for waiting for godot that I've seen before include "Samuel Beckett play" , "Drama" .)