Popular legend follows guide dog - the homeless type, bringing others down the wrong path (7,6)
I believe the answer is:
leading astray
'down the wrong path' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe there's an association between them I don't understand?
'popular legend follows guide dog the homeless type bringing others' is the wordplay.
I cannot really see how this works, but
'popular' could be 'in' and 'in' is present in the answer.
'legend' could be 'g' (leg-end - end letter of 'leg') and 'g' is located in the answer.
'guide' could be 'leadastray' (leading astray is a kind of guiding) and 'leadastray' is found in the leftover letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for leading astray that I've seen is " deceptive".)