Grounds for having a coin sent out (8)
I believe the answer is:
sediment
'grounds' is the definition.
(thesaurus)
'coin sent out' is the wordplay.
'coin' becomes 'dime' (dime is a kind of coin).
'out' means one lot of letters goes inside another.
'dime' placed inside 'sent' is 'SEDIMENT'.
'for having a' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for sediment that I've seen before include "Residue" , "I'm nested in mud" , "Remains" , "Lees" , "Material settling out in a liquid" .)