Cryptic crossword clue
Guards ordered to go in the Spanish spearhead 9

The most common and most likely answer to this crossword clue is the 9 letter word SENTINELS

I've seen this crossword clue in The Guardian
S
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N
T
I
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S

Buddy explains!

The straight part
We know that "Guards" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case guards = sentinels.
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 SENTINELS mean?

SENTINELS noun
  1. A sentry, watch, or guard.
  2. A private soldier.
  3. A unique string of characters recognised by a computer program for processing in a special way; a keyword.
  4. A sentinel crab.
  5. A sign of a health risk (e.g. a disease, an adverse effect).

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