The most common and most likely answer to this crossword clue is the 7 letter word REWOUND
I've seen this crossword clue in The Times
R
E
W
O
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More clues leading to the result REWOUND
Buddy explains!

The straight part
We know that "Turned back" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case turned back = rewound.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 REWOUND mean?
REWOUND verb- To wind (something) again.
- To wind (something) back, now especially of cassette or video tape, CD, DVD etc.; to go back on a video or audio recording.
- To go back or think back to a previous moment or place, or a previous point in a discourse.