The most common and most likely answer to this crossword clue is the 5 letter word AFOUL
A
F
O
U
L
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The straight part
We know that "in/conflict" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case in/conflict = afoul.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 AFOUL mean?
AFOUL adverb- (principally nautical) In a state of collision or entanglement.
- (with of) In a state of entanglement or conflict (with).