Cryptic crossword clue
Maybe Aston defends old Roman [DRES]S standards 7

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

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Buddy explains!

The straight part
We know that "Roman/standards" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case roman/standards = vexilla.
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 VEXILLA mean?

VEXILLA noun
  1. A flag, banner, or standard.
  2. A company of troops serving under one standard.
  3. The sign of the cross.
  4. The upper petal of a papilionaceous flower.
  5. The rhachis and web of a feather taken together; the vane.

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