One who lies and gets a tanning (9)
I believe the answer is:
sunbather
'one who lies and gets a tanning' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'one who lies and gets a' is the wordplay.
I cannot quite see how this works, but
'one' could be 'un' (northern English dialect form of 'one') and 'un' is located in the answer.
'a' is within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sunbather that I've seen before include "One trying to get brown" , "One hoping for a tan" , "Loafer on the beach" , "One enjoying holiday" , "Tanner" .)