The most common and most likely answer to this crossword clue is the 6 letter word SALVER
I've seen this crossword clue in Independent
S
A
L
V
E
R
More clues leading to the result SALVER
- Miserly type maybe hoarding pounds in trophy
- Waiter upset by verbals, dropping barrel
- Precious metal one extracted for a plate
- Leading lady gets rescuer astride charger
- Unctuous substance placed on right tray
- Frugal type puts in a pound for the plate
- This will carry goalkeeper across line
- Collector acquiring large plate
- I leave silver for a maritime saviour
- What the magpie left in the plate
Buddy explains!

The straight part
We know that "plate" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case plate = salver.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 SALVER mean?
SALVER noun- One who salves or cures.
- One who pretends to cure; a quacksalver.
- One who salves or saves goods, etc. from destruction or loss.
- A tray used to display or serve food or other items (such as a visiting card).