Henry to appear with holdall — one to fix locks needed (8)
I believe the answer is:
hairgrip
'one to fix locks needed' is the definition.
I can't tell whether this defines the answer.
'henry to appear with holdall' is the wordplay.
'henry' becomes 'H' (symbol for the unit of electrical inductance).
'to appear with' becomes 'air' (I can't explain this - if you can you should give a lot more credence to this answer).
'holdall' becomes 'grip' (I've seen this before).
'h'+'air'+'grip'='HAIRGRIP'
Can you help me to learn more?
(Another definition for hairgrip that I've seen is " one holding buns perhaps".)