Perhaps tissue in foot for example, connective primarily; one on one (6)
I believe the answer is:
fascia
'perhaps tissue' is the definition.
The definition and answer can be both body parts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'foot for example connective primarily one on one' is the wordplay.
'foot' becomes 'f' (abbreviation).
'for example' becomes 'as' (I've seen this in other clues).
'primarily' suggests taking the first letters.
'one' becomes 'I' (Roman numeral).
'on one' becomes 'a' (I am not sure about the 'on' bit.).
The initial letter of 'connective' is 'c'.
'f'+'as'+'c'+'i'+'a'='FASCIA'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for fascia that I've seen before include "Board above a shop with the name" , "Vehicle's dashboard" , "Flat surface (archit.)" , "Signboard above a shop" , "panel" .)