The most common and most likely answer to this crossword clue is the 8 letter word CHINAMEN
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More clues leading to the result CHINAMEN
Buddy explains!

The straight part
We know that "subjects" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case subjects = chinamen.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 CHINAMEN mean?
CHINAMEN noun- Older name for left-arm unorthodox bowling action (left-arm wrist-spin)
- A spin bowler who uses such an action
- A ball delivered with such an action