Heard boundary by England cricketer brings cheer (4,3)
I believe the answer is:
root for
'cheer' is the definition.
(I've seen this before)
'heard boundary by england cricketer' is the wordplay.
'heard' indicates a 'sounds like' (homophone) clue.
'boundary' becomes 'four' (cricket).
'by' is a charade indicator (letters next to each other).
'england cricketer' becomes 'Root' (Joe Root plays cricket for England).
'four' is a homophone of 'for'.
'for' after 'root' is 'ROOT FOR'.
'brings' acts as a link.
(Other definitions for root for that I've seen before include "support" , "cheer" .)