The most common and most likely answer to this crossword clue is the 8 letter word HAVILDAR
I've seen this crossword clue in Independent
H
A
V
I
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Buddy explains!
The straight part
We know that "Indian officer (sergeant)" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case indian officer (sergeant) = havildar.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 HAVILDAR mean?
HAVILDAR noun- A type of soldier in parts of India, later a specific military rank of the British Indian Army and of the modern armies of India and Pakistan, equivalent to sergeant.