Terribly dry, heated, starting to droop! (10)

I believe the answer is:

dehydrated

I'm a little stuck... Click here to teach me more about this clue!

'terribly dry heated starting to droop' is the definition.
I can't tell whether this defines the answer.

'terribly dry heated starting to droop' is the wordplay.
'terribly' indicates an anagram.
'starting to' says to take the initial letters.
The first letter of 'droop' is 'd'.
'dry'+'heated'='dryheated'
'dryheated' with letters rearranged gives 'dehydrate'.
'dehydrate'+'d'='DEHYDRATED'

Can you help me to learn more?

(Other definitions for dehydrated that I've seen before include "Drained" , "Short of water" , "Deprived of water" , "Parched" , "Desiccated" .)

I've seen this clue in the Sydney Morning Herald.

Want a hint initially instead of a full solution? Install my app