Reasonably practical? (8)
I believe the answer is:
sensible
'practical?' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for sensible that I've seen before include "Judicious line, Bess" , "Wise, prudent" , "As a matter of fact" , "Rational" , "Showing reason and sound judgment" .)