Lively maiden at ground (8)
I believe the answer is:
animated
'lively' is the definition.
('animated' can be similar in meaning to 'lively')
'maiden at ground' is the wordplay.
'ground' indicates an anagram (grind the letters ).
'maiden'+'at'='maidenat'
'maidenat' is an anagram of 'ANIMATED'.
(Other definitions for animated that I've seen before include "Diamante (anag)" , "'Lively, quick (8)'" , "Mandate I confer on the lively" , "Vivacious in diamante" , "full of beans" .)