What does the cryptic crossword clue "Virile chap, explosive and well practised (7)" mean?

The wordplay uses a charade (building blocks). STUD (synonym="STUD") + IED (synonym="Improvised Explosive Device") = STUDIED The answer is STUDIED.

Virile chap, explosive and well practised (7)

Guardian Cryptic #29575 | 15 Across | 2024-12-26 flower