Follow mountain pass, initially left and right, in special clothing (3,6)

I believe the answer is:
dog collar
'special clothing' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'follow mountain pass initially left and right' is the wordplay.
'follow' becomes 'dog' (dog can mean to follow or torment).
'mountain pass' becomes 'col' (col is a kind of mountain pass).
'initially' suggests taking the first letters.
The initial letters of 'left and right' is 'lar'.
'dog'+'col'+'lar'='DOG-COLLAR'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for dog collar that I've seen before include "What churchmen assume" , "Canine neck-band for clergymen" , "Vicar's neckwear" , "How to recognize vicar" , "Canine neckband - clerical wear" .)