Running rife on the meadow, is producing more foliage (7)
I believe the answer is:
leafier
'more foliage' is the definition.
(I've seen this before)
'running rife on the meadow' is the wordplay.
'running' indicates an anagram.
'on' means one lot of letters goes inside another (as in clothing \'on\' a person).
'the meadow' becomes 'lea' (I've seen this before).
'rife' anagrammed gives 'fier'.
'fier' enclosing 'lea' is 'LEAFIER'.
'is producing' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for leafier that I've seen before include "more rural" , "more green" , "sort of suburb" , "Having more foliage" .)