Beef has arrived,, not entirely without trimmings (8)
I believe the answer is:
complain
'beef' is the definition.
(I know that beef is a kind of complain)
'arrived not entirely without trimmings' is the wordplay.
I cannot really see how this works, but
'arrived' could be 'in' (I've seen this in other clues) and 'in' is found within the answer.
'not' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
This explanation may well be incorrect...
'has' acts as a link.
Can you help me to learn more?
(Other definitions for complain that I've seen before include "Grizzle" , "Grouse, grumble" , "Bemoan" , "Find fault" , "Grumble, carp" .)