Turned up over small part in film? (5)
I believe the answer is:
cameo
'part in film?' is the definition.
'cameo' can be an answer for 'part' (I have seen 'Small part' mean 'cameo' so perhaps 'part' could also mean 'cameo'). I'm not sure about the 'in film?' bit.
'turned up over small' is the wordplay.
'turned up' becomes 'came' (I've seen this in another clue).
'over small' becomes 'o' (cricket abbreviation; 'small' suggests an abbreviation).
'came'+'o'='CAMEO'
Can you help me to learn more?
(Other definitions for cameo that I've seen before include "Something small but well executed, say role in play" , "Carved brooch - small role" , "Ornament or miniature performance" , "Small role in film" , "Small acting role; item of jewellery" .)