See Mr Gore's resemblance to president Coolidge (3)

'president coolidge' is the definition.
(I've seen this in another clue)

'see mr gore's resemblance' is the wordplay.
I cannot quite see how this works, but
'see' could be 'c' (the word for the letter, according to Chambers) and 'c' is present in the answer.
'mr' could be 'al' and 'al' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...

'to' is the link.

Can you help me to learn more?