The most common and most likely answer to this crossword clue is the 7 letter word OUTWEAR
I've seen this crossword clue in The Daily Telegraph
O
U
T
W
E
A
R
More clues leading to the result OUTWEAR
- Last longer than exhausted enemy leader in conflict
- Striking pottery, we’re told, gets to remain
- Live through unpopular sport
- Enjoy longer life not working on river
- Last longer than others where French water treated
- Last longer than unfashionable sport
- Survive in garments designed for all winds and weathers?
- Last longer than unfashionable clothing
- Unfashionable clothes have a longer life
- In a bout we are able to last longer
Buddy explains!

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 OUTWEAR mean?
OUTWEAR verb- To wear out.
- To outlast; to survive or outlive longer than.