Is from the Grenadiers, possibly, this worker (8)
I believe the answer is:
gardener
'this worker' is the definition.
(type of worker)
'is from the grenadiers possibly' is the wordplay.
'from' is a deletion indicator.
'possibly' indicates an anagram.
'grenadiers' with 'is' removed is 'grenader'.
'grenader' with letters rearranged gives 'GARDENER'.
(Other definitions for gardener that I've seen before include "He tends cultivated land around house" , "Nursery employee" , "He tends flowers and shrubs" , "Red anger of an outdoor worker" , "Horticultural worker" .)