Telephone for legal aid? (4,3,6)

'legal aid?' is the definition.
I know nothing about this answer so I can't tell whether this works.

'telephone' is the wordplay.
I cannot really understand how this works, but
'telephone' could be 'call' (synonyms) and 'call' is located in the answer.
The remaining letters 'thepolice' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'for' acts as a link.

Can you help me to learn more?