Cryptic crossword clue
Dad’s climbing a lot of trees to find what lies below bark 7

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

I've seen this crossword clue in The Daily Telegraph
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Buddy explains!

The straight part
We know that "what lies below bark" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what lies below bark = sapwood.
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 SAPWOOD mean?

SAPWOOD noun
  1. The wood just under the bark of a stem or branch, different in color from the heartwood.

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