Answer: specialising

AnswerCrossword Clue
specialisingMake a habit of engaging in a particular activity
specialisingConfine oneself to providing a particular product or service
specialisingAdapt or set apart (an organ or part) to serve a special function or to suit a particular way of life
specialisingConcentrate on and become expert in a particular subject or skill
specialisingSPECIALISE, to make special or specific