Full of ups and downs? (5)
I believe the answer is:
hilly
'full of ups and downs?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hilly that I've seen before include "Not flat (country)" , "Like Chiltern or Cotswolds areas" , "Mountainous" , "Descriptive of undulating upland" , "Unlike flat land" .)