Paid a charge to get a grass border (8)
I believe the answer is:
rewarded
'paid a charge' is the definition.
The answer and definition can be both to do with communicating as well as being past participle verbs.
Perhaps they are linked in a way I don't understand?
'to get a grass border' is the wordplay.
'to get' becomes 're' (I've seen this in other clues).
'a grass border' becomes 'warded' (I can't explain this - if you can you should believe this answer much more).
're'+'warded'='REWARDED'
Can you help me to learn more?
(Other definitions for rewarded that I've seen before include "Offered something for a service or achievement" , "Honoured" , "profiting by it" , "Given something in recognition of effort" , "Recompensed for service" .)