Crossword Genius

Fasten right in line (4)

Ross

I believe the answer is:

tier

'line' is the definition.
(tier is a kind of line)

'fasten right' is the wordplay.
'fasten' becomes 'tie' (tying is a kind of fastening).
'right' becomes 'r' (common abbreviation).
'tie'+'r'='TIER'

'in' acts as a link.

(Other definitions for tier that I've seen before include "one doing Bond" , "He might do sailor's knots" , "Row, level" , "Echelon" , "One making knot - level" .)

I've seen this clue in the Evening Standard.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.