Wild daisy covering most of area, maybe (1,4,3)
I believe the answer is:
i dare say
'maybe' is the definition.
(I've seen this before)
'wild daisy covering most of area' is the wordplay.
'wild' indicates anagramming the letters.
'covering' means one lot of letters goes inside another.
'most of' means to remove the last letter.
'daisy' is an anagram of 'idsay'.
'area' with its last letter removed is 'are'.
'idsay' placed around 'are' is 'I DARE SAY'.
(Other definitions for i dare say that I've seen before include "Probably" , "One assumes" , "One would think" , "It's possible" , "Quite possibly" .)