Relates to what one feels, perhaps, when star acts riled, essentially (7)
I believe the answer is:
tactile
'relates to what one feels perhaps' is the definition.
I can't judge whether this defines the answer.
'star acts riled essentially' is the wordplay.
'star acts' becomes 'tact' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'essentially' means to look at the middle letters.
The central letters of 'riled' are 'ile'.
'tact'+'ile'='TACTILE'
'when' acts as a link.
Can you help me to learn more?
(Other definitions for tactile that I've seen before include "Pleasant to touch" , "be felt" , "Tangible - of touch" , "Based on the sense of touch" , "Relating to the sense of touch" .)