The most common and most likely answer to this crossword clue is the 10 letter word RESTRAINED
I've seen this crossword clue in The Times
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More clues leading to the result RESTRAINED
- Came down after snooze, subdued
- Relaxed about wet weather that's rather cold
- Nap, then shower — editor’s calm!
- Measured pressure in wind instrument
- Held in check, fell behind the others
- Tasteful melody in the woodwind
- Held back in reserve, and groomed
- Subjected to repression, learned new skills including self-defence, primarily
- Sober and at ease, consuming water
- Taught again to accept school’s head being aloof
Buddy explains!

The straight part
We know that "subdued" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case subdued = restrained.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 RESTRAINED mean?
RESTRAINED verb- To control or keep in check.
- To deprive of liberty.
- To restrict or limit.
- Held back, limited, kept in check or under control.