The most common and most likely answer to this crossword clue is the 5 plus 3 letter word BELOW PAR
I've seen this crossword clue in The Times
B
E
L
O
W
P
A
R
More clues leading to the result BELOW PAR
- Rap elbow nastily, a bit unwell
- Albatross, for one, is out of sorts
- Substandard, like three other solutions
- Not up to scratch? Better than that at golf!
- Inferior to 28, and rather poorly
- Performing relatively well on course, or rather poorly
- On course, performing relatively well or rather poorly?
- Out of sorts but doing well on sandwich course
- Out of sorts, hit catching back of knee: hit back!
- Not feeling good at a discount
Buddy explains!

The straight part
We know that "Out of sorts" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case out of sorts = below par.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.