Draw attention to show of indifference surrounding cup (9)
I believe the answer is:
spotlight
'draw attention to' is the definition.
(I've seen this before)
'of indifference surrounding cup' is the wordplay.
'of indifference' becomes 'slight' (I am not sure about this - if you are sure you should believe this answer much more).
'surrounding' means one lot of letters goes inside another.
'cup' becomes 'pot'.
'slight' enclosing 'pot' is 'SPOTLIGHT'.
'show' is the link.
Can you help me to learn more?
(Other definitions for spotlight that I've seen before include "fame" , "Give prominence to" , "Direct attention to" , "Prominent position" , "Illumination focused on small area" .)