Tool beginning to turn with spiked wheel (6)
I believe the answer is:
trowel
'tool' is the definition.
(trowel is a kind of tool)
'beginning to turn with spiked wheel' is the wordplay.
'beginning to' says to take the initial letters.
'with' means one lot of letters go next to another.
'spiked wheel' becomes 'rowel' (I've seen this before).
The first letter of 'turn' is 't'.
't'+'rowel'='TROWEL'
(Other definitions for trowel that I've seen before include "Small garden tool for handling plants" , "Small tool for scooping or spreading" , "Mortar-spreading tool" , "Small hand tool for garden" , "Hand tool for plasterers or gardeners" .)