City with hard water at a number of points (6)
I believe the answer is:
venice
'city' is the definition.
(Venice is an example)
'hard water at a number of points' is the wordplay.
I cannot quite understand how this works, but
'water' could be 'ice' (ice water is a kind of water) and 'ice' is present in the answer.
'number' could be 'v' (V is an example) and 'v' is present in the answer.
'points' could be 'en' (two compass points) and 'en' is located in the answer.
No letters remain.
This explanation may well be incorrect...
'with' acts as a link.
Can you help me to learn more?
(Other definitions for venice that I've seen before include "Messages" , "Wonderful Italian water-city" , "major tourist attraction" , "La Serenissima" , "Italian city once known as Queen of the Adriatic" .)