The most common and most likely answer to this crossword clue is the 6 letter word NETTED
I've seen this crossword clue in The Daily Telegraph
N
E
T
T
E
D
Buddy explains!
The straight part
We know that "Trapped" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case trapped = netted.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 NETTED mean?
NETTED verb- To catch by means of a net.
- To catch in a trap, or by stratagem.
- To enclose or cover with a net.
- To score (a goal).
- To hit the ball into the net.
- To form network or netting; to knit.
- To receive as profit.
- To yield as profit for.
- To fully hedge a position.