Regard jester disrobing beside me in the mirror (6)
I believe the answer is:
esteem
'regard jester' is the definition.
'esteem' can be an answer for 'regard' (esteeming is a kind of regarding). I'm not certain of the 'jester' bit.
'disrobing beside me in the mirror' is the wordplay.
'disrobing' becomes 'este' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'beside' means one lot of letters go next to another (I've seen this in other clues).
'in the mirror' says the letters should be written in reverse (the letter order is reflected backwards).
'me' back-to-front is 'em'.
'este'+'em'='ESTEEM'
Can you help me to learn more?
(Other definitions for esteem that I've seen before include "Floor covering" , "Revere(nce)" , "Value highly" , "Venerate" , "judge" .)