Partly yellow Indian snake (4)
I believe the answer is:
wind
'snake' is the definition.
(I've seen this before)
'partly yellow indian' is the wordplay.
'partly' indicates the answer is hidden within the clue.
'WIND' is hidden within 'yellow indian'.
(Other definitions for wind that I've seen before include "Breath; twist" , "Air-current" , "Twist, turn; breeze" , "Curl; knock breath out of" , "See 23" .)