Loud oral order for flowers (5)
I believe the answer is:
flora
'flowers' is the definition.
(I've seen this before)
'loud oral order' is the wordplay.
'loud' becomes 'f' (A musical term).
'order' indicates anagramming the letters.
'oral' is an anagram of 'lora'.
'f'+'lora'='FLORA'
'for' acts as a link.
(Other definitions for flora that I've seen before include "Roman goddess of flowers" , "A region's plants" , "Lots of plants" , "Various plants" , "Botanical specimens" .)