Bobby Charlton, on pitch, prompts English rejoicing initially (6)
I believe the answer is:
copper
'bobby' is the definition.
(I've seen this before)
'charlton on pitch prompts english rejoicing initially' is the wordplay.
'initially' suggests taking the first letters.
The first letters of 'charlton on pitch prompts english rejoicing' is 'COPPER'.
(Other definitions for copper that I've seen before include "Police officer (slang)" , "Red-brown metal" , "old tub" , "Part of force" , "Reddish-brown like colourful beech" .)