1 Across, Explorer in position on field where traversal is made (9)
8 Across, Satirical type-not -all-that-special versifier (8)
10 Across, Disclose writer bing brought in by publisher (4,2)
13 Across, Plant bringing tranquility to school (10)
Many thanks mallyh for the answer"LYRACIST" but it doe not fit with 7 Down,Musician with choirs had trips abroad (14) HARPSICHORDIST (anagram of "choirs had trips" Which I THINK? is right,many thanks all the same.