Lavish, wasteful (11)
I believe the answer is:
extravagant
I believe this is a double definition.
'lavish' is the first definition.
(synonyms)
'wasteful' is the second definition.
(similar in meaning)
(Other definitions for extravagant that I've seen before include "Ostentatious" , "wild" , "Prodigal" , "Wasteful; excessive" , "Excessive - spendthrift" .)