The most common and most likely answer to this crossword clue is the 6 letter word PESTLE
I've seen this crossword clue in The Guardian
P
E
S
T
L
E
More clues leading to the result PESTLE
- Pound steeply up? Not unknown
- Overcoming the French is something that bugs small club
- Parking. manipulated steel tool
- It crushes a bunch of limpest lettuces
- It crushes steel forged under pressure
- Pressure warped steel in 22’s partner
- Nuisance left with quarter pounder
- Foreign article holding up sauce no end? So get a grinder!
- Crusher brings pain to heads of Little Englanders
- Penny is the French version – I’m used to pound
Buddy explains!

The straight part
We know that "grinder" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case grinder = pestle.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does PESTLE mean?
PESTLE noun- A club-shaped, round-headed stick used in a mortar to pound, crush, rub or grind things.
- A constable's or bailiff's staff; so called from its shape.
- The leg and leg bone of an animal, especially of a pig.
- To pound, crush, rub or grind, as in a mortar with a pestle.