Clue: This may bore lawman caught up in affray (7)
Answer: BRADAWL
Explanation: Definition: This may bore
An envelope ('caught up in') of DA (District Attorney, American 'lawman') in BRAWL ('affray'). Or you might take 'up' as indicating a reversal, in which case the first A, rather than the second, is the one belonging with the D. Same difference.