The most common and most likely answer to this crossword clue is the 8 letter word CORACLES
I've seen this crossword clue in The Guardian
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Buddy explains!
The straight part
We know that "‘These boats have a wickerwork frame’" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ‘these boats have a wickerwork frame’ = coracles.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 CORACLES mean?
CORACLES noun- A small circular or oblong boat made of wickerwork and made watertight with hides or pitch, propelled and steered with a single paddle and light enough to be carried on a person's back.