Cryptic crossword clue
Supplies new handle for tillerseamen cracked stern only

The most common and most likely answer to this crossword clue is the 7 letter word RENAMES

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The straight part
We know that "Supplies new handle for" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case supplies new handle for = renames.
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 RENAMES mean?

RENAMES verb
  1. To give a new name to.

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