What does the cryptic crossword clue "Very unfeeling eccentric dents a theory (5,7)" mean?

The wordplay uses an anagram. anagram of DENTS + A + THEORY = STONYHEARTED The answer is STONYHEARTED.

Very unfeeling eccentric dents a theory (5,7)

Daily Mail Cryptic #17244 | 10 Down | 2023-12-06 flower