Implements for constructing stool (5)
I believe the answer is:
tools
'implements' is the definition.
(tool is a kind of implement)
'constructing stool' is the wordplay.
'constructing' is an anagram indicator.
'stool' anagrammed gives 'TOOLS'.
'for' is the link.
(Other definitions for tools that I've seen before include "Implements used to carry out particular functions" , "Devices or implements, as of the trade" , "Implements used in one's job" , "'A bad workman blames his . . . . .'" , "Hand implements" .)