Lord, round and fat, someone dim (7)
I believe the answer is:
dullard
'someone dim' is the definition.
I can't judge whether this defines the answer.
'lord round and fat' is the wordplay.
'lord' becomes 'lud'.
'round' says the letters should be written in reverse.
'and' says to put letters next to each other.
'fat' becomes 'lard' (lard is a kind of fat).
'lud' back-to-front is 'dul'.
'dul'+'lard'='DULLARD'
Can you help me to learn more?
(Other definitions for dullard that I've seen before include "Numbskull" , "Boring person" , "idiot" , "Slow or stupid person" , "Someone not very bright" .)