With which we shall have a measure of heat shown on a page? (7,3)
I believe the answer is:
weather map
'with which we shall' is the definition.
I can't judge whether this defines the answer.
'have a measure of heat shown on a page?' is the wordplay.
'have' becomes 'we' (I can't explain this - if you can you should give a lot more credence to this answer).
'measure of heat' becomes 'therm' (I've seen this before).
'shown on' says to put letters next to each other.
'page?' becomes 'p'.
'we'+'a'+'therm'+'a'+'p'='WEATHER-MAP'
Can you help me to learn more?
(Another definition for weather map that I've seen is " indication of which way the wind is blowing".)