Cryptic crossword clue
Unrestrained woman, one who’s finished losing heart 4

The most common and most likely answer to this crossword clue is the 4 letter word GOER

I've seen this crossword clue in The Guardian
G
O
E
R

Buddy explains!

The straight part
We know that "Unrestrained woman" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case unrestrained woman = goer.
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 GOER mean?

GOER noun
  1. One who, or that which, goes.
  2. Anything, especially a machine such as a motor car, that performs well, or operates successfully.
  3. A person, often a woman, who enjoys sexual activity.
  4. A foot (body part).
  5. A horse, considered in reference to its gait.

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