The most common and most likely answer to this crossword clue is the 6 letter word MAULVI
M
A
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I
Buddy explains!
The straight part
We know that "Learned man" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case learned man = maulvi.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 MAULVI mean?
MAULVI noun- An imam; a Muslim doctor of law.
- Any man of learning; a scholar, a teacher of Classical languages.