0 someone who is very good at a particular activity:
Marsh proves himself a dab hand at symphonic writing, creating charming melodies, vibrant tuttis and a wide range of instrumental colours.
Off the field, he was no mean pianist, entertaining at many club socials, and was described as a dab hand at chess.
He's a riddler, enigmatic, distrustful of appearances, generous in allusion, doubtless a dab hand at crossword puzzles.
He says that he flinches at an elf who's a dab hand with a longbow.
