Dad, Let's reverse the pale shade! (6)
I believe the answer is:
pastel
'the pale shade' is the definition.
'pastel' can be an answer for 'shade' (I have seen 'Delicate shade ' mean 'pastel' so perhaps 'shade' could also mean 'pastel'). I'm unsure of the 'the pale' bit.
'dad let's reverse' is the wordplay.
'dad' becomes 'pa' (synonyms).
'reverse' is a reversal indicator.
'lets' in reverse letter order is 'stel'.
'pa'+'stel'='PASTEL'
Can you help me to learn more?
(Other definitions for pastel that I've seen before include "Drawing crayon; light shade" , "Soft shade (of a colour)" , "Delicate shade; crayon" , "Pale or light colors" , "Crayon - pale colour" .)