The most common and most likely answer to this crossword clue is the 8 letter word UNWONTED
I've seen this crossword clue in The Daily Telegraph
U
N
W
O
N
T
E
D
More clues leading to the result UNWONTED
Buddy explains!
The straight part
We know that "Strange" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case strange = unwonted.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 UNWONTED mean?
UNWONTED adjective- Not customary or habitual; unusual; infrequent; strange.
- Unused (to); unaccustomed (to) something.