Singular small accessory for one's darling (7)
I believe the answer is:
sweetie
'one's darling' is the definition.
'sweetie' can be an answer for 'darling' (I've seen this before). I am unsure of the 'one's' bit.
'singular small accessory' is the wordplay.
'singular' becomes 's' (abbreviation sometimes used in dictionaries).
'small' becomes 'wee' (Scottish term for small).
'accessory' becomes 'tie' (I've seen this before).
's'+'wee'+'tie'='SWEETIE'
'for' is the link.
Can you help me to learn more?
(Other definitions for sweetie that I've seen before include "Term of endearment" , "treasure?" , "dear" , "honey" , "Maybe boyfriend" .)