Cryptic crossword clue
King say, is keeping in mind what soldiers should wear 11

The most common and most likely answer to this crossword clue is the 11 letter word REGIMENTALS

I've seen this crossword clue in The Daily Telegraph
R
E
G
I
M
E
N
T
A
L
S


Buddy explains!

The straight part
We know that "what soldiers should wear" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what soldiers should wear = regimentals.
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.

Crossword Answer definitions

REGIMENTALS noun
  1. The uniform worn by a soldier in a regiment.

Latest crossword clues with full explanations