Lover all smiles purchasing work clothing (8)
I believe the answer is:
overalls
'work clothing' is the definition.
'lover all smiles purchasing' is the wordplay.
'purchasing' indicates a hidden word.
'OVERALLS' can be found hidden inside 'lover all smiles'.
(Other definitions for overalls that I've seen before include "Protective wear" , "Save roll (anag.)" , "Boiler suits" , "Boilersuits" , "Protective garment" .)