18 down
Fundamental
principles
I
start
to
challenge
in
low
voice
(6)
Fundamental principles I start to challenge in low voice (6)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
Look at Fundamental principles as the definition, and the rest builds it from a low voice. Take BASS (a low voice) and tuck I plus C, the start of "challenge", inside it. That splits the bass as BAS and S around the IC, giving BAS + IC + S.