Traveller in greater need of water has head dropping (5)
I believe the answer is:
rider
'traveller' is the definition.
(I know that rider is a type of traveller)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for rider that I've seen before include "Stipulation" , "One on a horse or cycle" , "Passenger" , "One may be saddled" , "Person in the saddle" .)