The most common and most likely answer to this crossword clue is the 7 letter word OUTWORN
I've seen this crossword clue in The Guardian
O
U
T
W
O
R
N
More clues leading to the result OUTWORN
- In St Nazaire, where a couple of sailors dated
- Tired old couple filling pot
- Tired old couple filling vase
- A couple in our navy are obsolete
- Exhausted couple boarding old vessel
- Antiquated old couple drowned in vat of tea?
- Worried our town appears behind the times
- Archaic old university undecided about wife
- Old container containing couple’s old hat
- Exhausted old couple breaking vase
Buddy explains!

The straight part
We know that "obsolete" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case obsolete = outworn.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 OUTWORN mean?
OUTWORN verb- To wear out.
- To outlast; to survive or outlive longer than.
- No longer usable
- Worn out
- Out of date