Firm area tasted great in bananas (7,6)
I believe the answer is:
trading estate
'firm area' is the definition.
The definition suggests a singular noun which matches the answer.
'tasted great in bananas' is the wordplay.
'bananas' indicates an anagram (bananas can informally mean crazy).
'tasted'+'great'+'in'='tastedgreatin'
'tastedgreatin' with letters rearranged gives 'TRADING ESTATE'.
Can you help me to learn more?
(Other definitions for trading estate that I've seen before include "Industrial/commercial zone" , "Commercial zone" , "Area with factories" , "where the industrial firms are concentrated?" , "Industrial and commercial area" .)