The most common and most likely answer to this crossword clue is the 8 letter word RECYCLES
I've seen this crossword clue in The Guardian
R
E
C
Y
C
L
E
S
Buddy explains!

The straight part
We know that "Uses again" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case uses again = recycles.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 RECYCLES mean?
RECYCLES verb- To break down and reuse component materials.
- To reuse as a whole.
- To collect or place in a bin for recycling.
- To be recycled.
- To discard into a recycling bin.