The term 'Seasoned Pro' is a phrase used to describe someone who has a great deal of experience in their field. The crossword solutions for this term are STAGER (6 letters) and ACE (3 letters). A 'STAGER' is someone who has been in the same profession for a long period of time, while an 'ACE' is someone who is highly skilled and experienced in their field. Both terms can be used to describe a Seasoned Pro, someone who has a great deal of experience and expertise in their chosen profession.