With them see each year's early session beginnings (4)
I believe the answer is:
eyes
'with them' is the definition.
I can't judge whether this defines the answer.
'each year's early session beginnings' is the wordplay.
'beginnings' indicates taking the first letters.
The initial letters of 'each years early session' is 'EYES'.
'see' acts as a link.
Can you help me to learn more?
(Other definitions for eyes that I've seen before include "They have pupils" , "Ophthalmologist's speciality" , "Peacock's tail markings" , "They see and" , "Are they made to suggest possible date" .)