Deal with streak of silver in the hair (6)
I believe the answer is:
manage
'deal with' is the definition.
(synonyms)
'silver in the hair' is the wordplay.
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'in the' is an insertion indicator.
'hair' becomes 'mane' (mane is a kind of hair).
'ag' put into 'mane' is 'MANAGE'.
'streak of' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for manage that I've seen before include "Organise" , "get on" , "Run, administer" , "Run (a football team)" , "Take responsibility for" .)