Bumpy land due to rocks (9)

I believe the answer is:

nodulated

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

'bumpy' is the definition.
Both the answer and definition are adjectives. Perhaps there's a link between them I don't understand?

'land due to rocks' is the wordplay.
'rocks' is an anagram indicator.
'land'+'due'+'to'='landdueto'
'landdueto' is an anagram of 'NODULATED'.

Can you help me to learn more?

(Another definition for nodulated that I've seen is " Having abnormal growths".)

I've seen this clue in The Sunday Times and The Times.

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