See the star turn (4)
I believe the answer is:
spot
'see' is the definition.
(to spot is to notice or catch sight of)
'the star turn' is the wordplay.
'the' becomes 't' (the is pronounced as a 't' sound in some dialects).
'star' becomes 'ops' (I can't explain this - if you can you should give a lot more credence to this answer).
'turn' says the letters should be written in reverse.
't'+'ops'='tops'
'tops' in reverse letter order is 'SPOT'.
Can you help me to learn more?
(Other definitions for spot that I've seen before include "Notice; sign of acne" , "See; eruption" , "Notice; mark" , "Observe - place" , "[NIGHTCLUB]" .)