Grass from Western Wales to some extent recalled (4)
I believe the answer is:
lawn
'grass' is the definition.
(a lawn is an area of grass)
'western wales to some extent recalled' is the wordplay.
'to some extent' indicates the answer is hidden within the clue.
'recalled' is a reversal indicator (to recall can mean to bring something back).
'nwal' is hidden in the letters of 'western wales'.
'nwal' back-to-front is 'LAWN'.
'from' is the link.
(Other definitions for lawn that I've seen before include "Fine cotton or grass garden" , "Patch of grass in the garden" , "Grassy expanse" , "Grass, as for tennis" , "Grassed area" .)