Small gardening tool in Oxford, for example (4)
I believe the answer is:
shoe
'oxford for example' is the definition.
(I know that oxford is a type of shoe)
'small gardening tool' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'gardening tool' becomes 'hoe' (hoes are used for gardening).
's'+'hoe'='SHOE'
'in' is the link.
(Other definitions for shoe that I've seen before include "mule, perhaps?" , "Work as a farrier" , "From which playing cards are dealt one at a time" , "pump, say" , "Slip-on or lace-up?" .)