Fantastic teacher for beginners gives uplifting reassurance unerringly (4)
I believe the answer is:
guru
'fantastic teacher' is the definition.
'guru' can be an answer for 'teacher' (I have seen 'Religious teacher' mean 'guru' so perhaps 'teacher' could also mean 'guru'). I am unsure of the 'fantastic' bit.
'beginners gives uplifting reassurance unerringly' is the wordplay.
'beginners' says to take the initial letters.
The initial letters of 'gives uplifting reassurance unerringly' is 'GURU'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for guru that I've seen before include "Religious leader and spiritual teacher" , "Wise leader" , "Revered mentor" , "Recognised expert in some field" , "Recognised leader in some field" .)