Urge son, perhaps, to get a job in the theatre (7)
I believe the answer is:
surgeon
'get a job in the theatre' is the definition.
I can't judge whether this definition defines the answer.
'urge son perhaps' is the wordplay.
'perhaps' indicates anagramming the letters.
'urge'+'son'='urgeson'
'urgeson' is an anagram of 'SURGEON'.
'to' is the link.
Can you help me to learn more?
(Other definitions for surgeon that I've seen before include "Theatre worker" , "Medical specialist" , "Doctor in operating theatre - RN doctor" , "Doctor in the navy" , "one performing in the theatre" .)