The most common and most likely answer to this crossword clue is the 5 letter word INGOT
I've seen this crossword clue in The Guardian
I
N
G
O
T
More clues leading to the result INGOT
- At one's office, bought bar of gold
- Occupying fast car circling round block
- Gold bar obtained after mint is stripped of million tons
- Bar that’s fashionable acquired
- Metal bar obscuring other exhibits
- At home, received what may be gold
- Possessing a lot of money, moved into expensive block
- Bar serving gin to drunk
- Expensive bar serving otherworldly bottles
- Transport gin to bar
Buddy explains!

The straight part
We know that "expensive block" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case expensive block = ingot.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 INGOT mean?
INGOT noun- A solid block of more or less pure metal, often but not necessarily bricklike in shape and trapezoidal in cross-section, the result of pouring out and cooling molten metal, often immediately after smelting from raw ore or alloying from constituents.
- To form (scraps of metal) into ingots.