Teacher's anguish (4)
I believe the answer is:
ache
'anguish' is the definition.
(I've seen this before)
'teacher's' is the wordplay.
'ACHE' is hidden in amongst the letters.
However, I'm not sure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for ache that I've seen before include "Nagging pain" , "yearning" , "Dull steady pain" , "Play up" , "burn" .)