What’s going badly during return walking route (7)
I believe the answer is:
pathway
'walking route' is the definition.
(path for walking on)
'what's going badly during return' is the wordplay.
'going badly' indicates an anagram.
'during' is an insertion indicator.
'return' becomes 'pay' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'what' anagrammed gives 'thwa'.
'thwa' put inside 'pay' is 'PATHWAY'.
Can you help me to learn more?
(Other definitions for pathway that I've seen before include "Walking track" , "route? ..." , "A trodden track" .)