Indian side cheers on attack that lacks depth (5)
I believe the answer is:
raita
'indian side cheers on attack that lacks depth' is the definition.
'raita' can be an answer for 'indian side' (raita is an Indian side dish). I am not sure about the rest of the definition.
'indian side cheers on' is the wordplay.
'indian side' becomes 'rai' (I can't justify this - if you can you should give a lot more credence to this answer).
'cheers' becomes 'ta' (both can mean thank you).
'on' is a charade indicator (letters next to each other).
'rai'+'ta'='RAITA'
Can you help me to learn more?
(Other definitions for raita that I've seen before include "Indian food good as side-dish" , "side order" , "cooling dish" , "Indian yogurt dip" , "Indian dish of chopped cucumber and yoghurt" .)