The most common and most likely answer to this crossword clue is the 6 letter word GOINGS
I've seen this crossword clue in The Times
G
O
I
N
G
S
More clues leading to the result GOINGS
- Odd behaviour of lad after running
- One wearing medals running funny business
- Medals hung around one lad for actions
- Dodgy business in grocery store primarily bypassed by idiot
- Shenanigans — performing after international gets into medals
- Performing boy creates strange events
- Funny business from the departing prodigal?
- Mischief off lad
- Leave outdoors offspring to be seen about good behaviour
- Absconding child constitutes misconduct
Buddy explains!

The straight part
We know that "Odd behaviour" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case odd behaviour = goings.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 GOINGS mean?
GOINGS noun- A departure.
- The suitability of ground for riding, walking etc.
- Progress.
- Conditions for advancing in any way.
- Pregnancy; gestation; childbearing
- (in the plural) Course of life; behaviour; doings; ways.
- (in the phrase "the going of") The whereabouts (of something).