Would the cha-cha-cha be suitable for them? (3,6)

'would' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'the cha-cha-cha be suitable for them?' is the wordplay.
I cannot quite see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
'cha-cha-cha' could be 'dance' (cha-cha-cha is an example) and 'dance' is located in the answer.
The remaining letters 'eas' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?