I'd say perhaps it's quite a common flower (5)
I believe the answer is:
daisy
'a common flower' is the definition.
(I've seen this before)
'i'd say perhaps' is the wordplay.
'perhaps' indicates an anagram.
'id'+'say'='idsay'
'idsay' is an anagram of 'DAISY'.
'it's quite' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for daisy that I've seen before include "Grassland plant" , "chain, just the smallest bit?" , "Common wild flower" , "girl" , "Common plant" .)