Hello Aspirant
The exact number of seats for just the clinical subjects is not clearly known on the official website of mci. However i can provide you with details of the total number of medical postgraduate seats in india.
there are 10,821 Master of Surgery (MS) seats, 19,953 Doctor of Medicine (MD) seats and 1,979 PG Diploma seats offered by 6,102 government, private, Deemed and Central Universities.
You can visit the given link for more details:-
https://www.google.com/amp/s/medicine.careers360.com/articles/neet-pg/amp