Tim Key turned up in middle of cast leaks (6)
I believe the answer is:
admits
'leaks' is the definition.
The answer and definition can be both to do with communicating as well as being verbs in their -s form.
Maybe they are linked in a way I don't understand?
'tim key turned up in middle of cast' is the wordplay.
'key' becomes 'd' (musical key).
'turned up' shows that the letters should be reversed in order.
'in' means one lot of letters goes inside another.
'middle of' indicates the central letters.
The middle letters of 'cast' are 'as'.
'tim'+'d'='timd'
'timd' backwards is 'dmit'.
'dmit' going within 'as' is 'ADMITS'.
Can you help me to learn more?
(Other definitions for admits that I've seen before include "Allows in or accepts guilt" , "Owns up or lets in" , "Takes in" , "Lets in and confesses" , "Owns up or grants entrance to" .)