Delighted to do work cleaning Mediterranean (7)
I believe the answer is:
charmed
'delighted' is the definition.
(charm can mean to please or delight)
'do work cleaning mediterranean' is the wordplay.
I cannot quite see how this works, but
'do' could be 'char' (I've seen this before) and 'char' is found in the answer.
'mediterranean' could be 'med' (short for Mediterranean Sea) and 'med' is located in the answer.
No letters remain.
This explanation may well be incorrect...
'to' is the link.
Can you help me to learn more?
(Other definitions for charmed that I've seen before include "Entranced" , "Unusually lucky" , "Enchanted" , "blessed by fortune" .)