The most common and most likely answer to this crossword clue is the 7 letter word TENTERS
T
E
N
T
E
R
S
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The straight part
We know that "Stretchers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stretchers = tenters.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 TENTERS mean?
TENTERS noun- A framework upon which cloth is stretched and dried.
- One who takes care of, or tends, machines in a factory; a kind of assistant foreman.
- A kind of governor, or regulating device.