Book with education essentials? It’s fresh! (4)
I believe the answer is:
brrr
'fresh' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'book with education essentials?' is the wordplay.
'book' becomes 'b' (abbreviation for book).
'with' means one lot of letters go next to another.
'education essentials?' becomes 'rrr' (I am not sure about this - if you are sure you should believe this answer much more).
'b'+'rrr'='BRRR'
'it's' is the link.
Can you help me to learn more?
(Other definitions for brrr that I've seen before include "Cold person's exclamation" , "Complaint about cold" , "cold response" , "Indication of iciness" , "How freezing" .)