The term 'CHECK CAREFULLY' can be solved by two crossword solutions: EXAMINE (7 letters) and VET (3 letters). EXAMINE is a verb meaning to look at something closely and carefully in order to detect any errors or problems. VET is a verb meaning to EXAMINE something or someone thoroughly, often for the purpose of approval or certification. Both words imply a thorough examination of something or someone, which is the essence of the phrase 'CHECK CAREFULLY'.