Arm carries wood and laundry (7)
I believe the answer is:
washing
'laundry' is the definition.
(I've seen this before)
'arm carries wood' is the wordplay.
'arm' becomes 'wing' (I can't justify this - if you can you should give a lot more credence to this answer).
'carries' indicates putting letters inside (inserted letters carried inside).
'wood' becomes 'ash' (wood from an ash tree).
'wing' going around 'ash' is 'WASHING'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for washing that I've seen before include "(and 18) Domestic appliance" , "Cleansing" , "Cleaning - laundry" , "Cleaning with soap and water" .)