The most common and most likely answer to this crossword clue is the 6 letter word ERRANT
I've seen this crossword clue in The Times
E
R
R
A
N
T
More clues leading to the result ERRANT
- Wayward monarch right to be seen by social worker
- Queen to speak wildly? That’s out of place
- Little hesitation with tirade straying from standards
- Rambling Cockney girl's tirade
- Offending member of Royalty with tirade
- Wayward shoplifter ran through stores
- Unruly and merry, wants to shed clothing
- Wayward English worker steals expensive car
- Wayward German man loses head with social worker
- Quixotic knight in Terra Obscura
Buddy explains!

The straight part
We know that "straying from standards" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case straying from standards = errant.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 ERRANT mean?
ERRANT noun- A knight-errant.
- Straying from the proper course or standard, or outside established limits.
- Wandering; roving around.
- Prone to making errors; misbehaved.
- Utter, complete (negative); arrant.