The term 'dab hand' is a British expression meaning someone who is skilled or adept at a particular task. The crossword solutions for this term are PRO (3 letters), DEFT (4 letters), SKILL (5 letters), and ACE (3 letters). PRO is short for professional, DEFT means skillful or adroit, SKILL is the ability to do something well, and ACE is an expert or master. Together, these words indicate that a dab hand is someone who is highly experienced and proficient in their field.