Manage to get English letter (4)
I believe the answer is:
rune
'letter' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'manage to get english' is the wordplay.
'manage' becomes 'run' (both can mean to organise).
'to get' means one lot of letters go next to another.
'english' becomes 'E' (abbreviation as in OED).
'run'+'e'='RUNE'
Can you help me to learn more?
(Other definitions for rune that I've seen before include "Letter of an ancient Germanic alphabet" , "Ancient character" , "Mystic symbol" , "Ancient symbol" , "Old Scandinavian letter" .)