Please put in an old-fashioned way (7)
I believe the answer is:
prithee
'please' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for prithee that I've seen before include "Please (archaic)" , "Old request" , "Please - tip here (anag)" , "Please! (Old English)" .)