Head of Latin at school makes you squeal (3,2)
I believe the answer is:
let on
'you squeal' is the definition.
The definition and answer can be both to do with communicating as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'head of latin at school' is the wordplay.
'head of' suggests taking the first letters.
'at' says to put letters next to each other.
'school' becomes 'eton' (famous UK public school).
The initial letter of 'latin' is 'l'.
'l'+'eton'='LET ON'
'makes' is the link.
Can you help me to learn more?
(Other definitions for let on that I've seen before include "Pretend, feign" , "Disclose awareness" , "Allow to board, or pretend" , "Divulge (secret to)" , "Divulge information" .)