Strong feeling to palm off about one (7)
I believe the answer is:
passion
'strong feeling' is the definition.
(I've seen this before)
'palm off about one' is the wordplay.
I cannot quite see how this works, but
'about' could be 'on' (as in a book 'on' a certain topic) and 'on' is located in the answer.
'one' could be 'i' (Roman numeral) and 'i' is found within the answer.
The remaining letters 'pass' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
(Other definitions for passion that I've seen before include "Strong feeling of intense emotion" , "Strong feeling, or anger or desire possibly" , "Ardour, fervour" , "Fervent love" , "thing one really cares about" .)