Cryptic crossword clue
Ordnance depot ignoring temperature in the derelict mortuary 7

The most common and most likely answer to this crossword clue is the 7 letter word ARMOURY

A
R
M
O
U
R
Y

Buddy explains!

The straight part
We know that "Ordnance depot" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ordnance depot = armoury.
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 ARMOURY mean?

ARMOURY noun
  1. Heraldry
  2. A place where arms are kept, an arsenal.
  3. A collection of weapons and materiel.
  4. A place where arms are made.

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