Male offspring entertaining whim to become medic (7)
I believe the answer is:
surgeon
'medic' is the definition.
(I've seen this before)
'male offspring entertaining whim' is the wordplay.
'male offspring' becomes 'son' (son is a kind of male offspring).
'entertaining' is an insertion indicator.
'whim' becomes 'urge' (I can't justify this - if you can you should give a lot more credence to this answer).
'son' going around 'urge' is 'SURGEON'.
'to become' is the link.
Can you help me to learn more?
(Other definitions for surgeon that I've seen before include "Man with knife" , "Doctor with cutting tools" , "Sawbones" , "one performing in the theatre" , "one used to working in the theatre" .)