Portrait of senior teacher's attractive (8)
I believe the answer is:
headshot
'portrait' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'senior teacher's attractive' is the wordplay.
'senior teacher's' becomes 'head's' (short for head teacher).
'attractive' becomes 'hot' (hot can mean attractive).
'heads'+'hot'='HEADSHOT'
'of' is the link.
Can you help me to learn more?
(Another definition for headshot that I've seen is " Photo showing just the face".)