The most common and most likely answer to this crossword clue is the 5 letter word TUNED
I've seen this crossword clue in The Times
T
U
N
E
D
More clues leading to the result TUNED
- Ready to play part of contest – unedifying
- Took a corner with no right to be on pitch
- Adjusted number on front of door
- Prepared the pitch and square with a French top dressing
- Made adjustment, having changed course without resistance
- Tough to keep one properly adjusted
- Moved round without resistance — fit to play?
Buddy explains!

The straight part
We know that "properly adjusted" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case properly adjusted = tuned.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 TUNED mean?
TUNED verb- To adjust (a musical instrument) so that it produces the correct pitches.
- To adjust or modify (esp. a mechanical or electrical device) so that it functions optimally.
- To adjust the frequency on a radio or TV set, so as to receive the desired channel.
- (e.g. of senses or faculties) To adapt to or direct towards a particular target.
- To make more precise, intense, or effective; to put into a proper state or disposition.
- To attune; to adapt in style of music; to make harmonious.
- To give a certain tone or character to.
- To sing with melody or harmony.
- To cheek; to be impudent towards.
- Adjusted in pitch or resonance.