Small lock of hair given special emphasis (6)
I believe the answer is:
stress
'special emphasis' is the definition.
'stress' can be an answer for 'emphasis' (synonyms). I'm unsure of the 'special' bit.
'small lock of hair given' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'lock of hair' becomes 'tress' (I've seen this before).
'given' is a charade indicator (letters next to each other).
's'+'tress'='STRESS'
Can you help me to learn more?
(Other definitions for stress that I've seen before include "Highlight" , "result of being overworked" , "Particular emphasis" , "possible cause of fracture?" , "Emphasis on anxiety?" .)