Equipment for locks doctor needed in more dangerous environment (9)

I believe the answer is:

hairdrier

I'm a little stuck... Click here to teach me more about this clue!

'in more dangerous environment' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'equipment for locks doctor' is the wordplay.
'equipment' becomes 'ier' (I am not sure about this - if you are sure you should believe this answer much more).
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'locks' becomes 'hair' (locks can mean hair).
'doctor' becomes 'dr' (abbreviation).
'hair'+'dr'='hairdr'
'ier' after 'hairdr' is 'HAIRDRIER'.

'needed' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

Want a hint initially instead of a full solution? Install my app