The most common and most likely answer to this crossword clue is the 5 letter word SO-SO
I've seen this crossword clue in Independent
S
O
-
S
O
More clues leading to the result SO-SO
- Indifferent emergency appeal gains nought
- Indifferent over after spinner on song initially
- Average emergency call needs oxygen
- Appeal for help and love just about acceptable?
- Very very average!
- Indifferent beginning to operation after distress call
- Help us love moderate
- Very good … very good … distinctly average
- Indifferent appeal by Yorkshire’s number two
- Indifferent when sailor’s grabbed by drunk? Not entirely
Buddy explains!

The straight part
We know that "OK" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ok = so-so.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
SO-SO adjective- Neither good nor bad; tolerable, passable, indifferent.
- Neither very well nor very poorly.