20 across
Have
no
argument
with
an
Athenian
amputee
(5)
Have no argument with an Athenian amputee (5)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Have no argument — to be in concord. For the wordplay, take an to give you A, then an Athenian points to GREEK, which gets its last letter lopped off (amputee) to leave GREE. Put them together and there's your answer.