The phrase "specialized area" refers to a specific and narrow field of expertise or knowledge, where someone has taken the time to specialize and become highly skilled in a particular subject or activity. Full definition
Our training provides opportunities to work in specialized areas of family and couples therapy. (icpnyc.org)
This behaviour occurs quite frequently in the family law area and in specialized areas of the law where there are a limited number of experts. (slaw.ca)
This focus includes the highly specialized area of diagnosing for and treating parental alienation. (eapap.eu)