Male teacher has son with friend (5)
I believe the answer is:
swami
'male teacher' is the definition.
'swami' can be an answer for 'teacher' (I've seen this before). I'm unsure of the 'male' bit.
'son with friend' is the wordplay.
'son' becomes 's'.
'with' becomes 'w' (abbreviation).
'friend' becomes 'ami' (I've seen this before).
's'+'w'+'ami'='SWAMI'
'has' is the link.
Can you help me to learn more?
(Other definitions for swami that I've seen before include "How to address Hindu dignitary" , "Religious leader" , "Hindu religious instructor" , "Indian religious teacher" , "Hindu mystic" .)