Meadow with bit of foliage? Bit of foliage! (4)
I believe the answer is:
leaf
'bit of foliage' is the definition.
(foliage means leaves)
'meadow with bit of foliage?' is the wordplay.
'meadow' becomes 'lea' (a lea is a grassy area).
'with' means one lot of letters go next to another.
'bit of' indicates taking the first letters.
The initial letter of 'foliage' is 'f'.
'lea'+'f'='LEAF'
(Other definitions for leaf that I've seen before include "Page or piece of foliage" , "See 1" , "Small part of wood" , "Thin sheet of metal" , "Flag" .)