Who can show you the way (3)
I believe the answer is:
how
'the way' is the definition.
(how something is done)
'who can show' is the wordplay.
'who' can be anagrammed to 'HOW'.
But, I'm unsure how the anagram is indicated.
'you' is the link.
Can you help me to learn more?
(Other definitions for how that I've seen before include "By what means?" , "See 16" , "In what way?" , "In what manner or method?" , "Who (anag.)" .)