Extremely tardy to fill in passport, say, in the middle of nowhere (8)
I believe the answer is:
isolated
'middle of nowhere' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'extremely tardy to fill in passport say in' is the wordplay.
'extremely' becomes 'so' ('so' can mean 'extremely' or 'very').
'tardy' becomes 'late' (synonyms).
'to fill in' indicates putting letters inside.
'passport say' becomes 'ID' (a passport is identification).
'in' is an insertion indicator.
'late' put within 'id' is 'ilated'.
'so' going within 'ilated' is 'ISOLATED'.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for isolated that I've seen before include "Segregated" , "Set apart, quarantined" , "Set apart from others" , "Single" , "Remote; lonely" .)