The fellow grabbing old garden tool (3)
I believe the answer is:
hoe
'garden tool' is the definition.
(tool used when gardening)
'the fellow grabbing old' is the wordplay.
'the fellow' becomes 'he' (pronoun for a man).
'grabbing' indicates putting letters inside.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'he' going around 'o' is 'HOE'.
(Other definitions for hoe that I've seen before include "Romanians (anag) -- European enclave" , "Purple gem" , "Weeding tool" , "Plymouth - -" , "Tool for loosening soil and scraping up weeds" .)