26 across
Hit
copper
with
great
force
(4)
Hit copper with great force (4)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Hit, giving you a word meaning to strike. You get there by taking CU (the chemical symbol for copper) and sticking FF on the end (F being the abbreviation for force, so FF is a very great force indeed).