Scared fellow tied the knot (5)
I believe the answer is:
cowed
'scared' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?
'fellow tied the knot' is the wordplay.
'fellow' becomes 'co' (eg a co-worker is a fellow worker).
'tied the knot' becomes 'we'd' (I've seen this in another clue).
'co'+'wed'='COWED'
Can you help me to learn more?
(Other definitions for cowed that I've seen before include "Overawed" , "Subdued, kept under" , "Subdued in bovine way?" , "Browbeaten" , "Intimidated, subdued" .)