He kneads to use arms in a way! (7)
I believe the answer is:
masseur
'he kneads' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'use arms in a way' is the wordplay.
'in a way' indicates an anagram.
'use'+'arms'='usearms'
'usearms' with letters rearranged gives 'MASSEUR'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for masseur that I've seen before include "Professional rubber?" , "Sue Mars (anag.)" , "One who kneads and strokes" , "One easing tension" , "Maybe physio" .)