Cares about seer's imagination (5,3)
I believe the answer is:
minds eye
'imagination' is the definition.
(mind's eye is a kind of imagination)
'cares about seer's' is the wordplay.
'cares about' becomes 'minds' (I've seen this in another clue).
'seer's' becomes 'eye' (I can't explain this - if you can you should give a lot more credence to this answer).
'minds'+'eye'='MINDS EYE'
Can you help me to learn more?
(Other definitions for minds eye that I've seen before include "The faculty of imagination" , "contemplation" , "memory's required" .)