Diet a man has to become lively (8)
I believe the answer is:
animated
'lively' is the definition.
(synonyms)
'diet a man has to' is the wordplay.
'diet a man' can be anagrammed to 'ANIMATED'.
However, I am unsure how this is indicated.
'become' is the link.
Can you help me to learn more?
(Other definitions for animated that I've seen before include "put in spirit" , "Lively - brought to life by Disney?" , "full of spirit" , "full of beans" , "Vivacious in diamante" .)