Ability to trigger alarm and any amount of locks? (9)

'ability' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Maybe you can see a link between them that I don't see?

'trigger alarm and any amount of locks?' is the wordplay.
I cannot quite see how this works, but
'trigger' could be 'hair' (hair trigger is a kind of trigger) and 'hair' is found in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is found in the answer.
'amount' could be 's' (S is an example) and 's' is present in the answer.
This explanation may well be incorrect...

'to' is the link.

Can you help me to learn more?