Flowering plant requiring market’s first permit (6)
I believe the answer is:
mallow
'flowering plant' is the definition.
The definition and answer can be both plants as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'market's first permit' is the wordplay.
'market's first' becomes 'm' (1st letter of 'market').
'permit' becomes 'allow' (synonyms).
'm'+'allow'='MALLOW'
'requiring' is the link.
Can you help me to learn more?
(Other definitions for mallow that I've seen before include "'Cork town, a plant and a sweet (6)'" , "Hairy-stemmed plant" , "Shrub" , "Downy-leaved plant and Cork town" .)