Show how everyone gets a letter (5)
I believe the answer is:
teach
'show how' is the definition.
(I've seen this in another clue)
'everyone gets a letter' is the wordplay.
'everyone' becomes 'tec' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'gets' is an insertion indicator (gets can mean captures or absorbs).
'letter' becomes 'h'.
'tec' going around 'a' is 'teac'.
'teac'+'h'='TEACH'
Can you help me to learn more?
(Other definitions for teach that I've seen before include "Work in school" , "show" , "Instruct, enlighten" , "Coach" , "Educate 4 across" .)