Grassy area in UK holiday region protected by special gardener (10)
I believe the answer is:
greensward
'grassy area' is the definition.
(greensward means grass-covered ground)
'uk holiday region protected by special gardener' is the wordplay.
'uk holiday region' becomes 'SW' (South West of England).
'protected by' indicates putting letters inside.
'special' is an anagram indicator.
'gardener' with letters rearranged gives 'greenard'.
'sw' put inside 'greenard' is 'GREENSWARD'.
'in' acts as a link.
(Other definitions for greensward that I've seen before include "Lawn" , "mostly turf" , "Grass covered ground" .)