Liberal entering has been received topless — he'd get an eyeful! (5)
I believe the answer is:
ogler
'liberal entering has been received topless he'd' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'get an eyeful' is the wordplay.
I cannot quite see how this works, but
'get an eyeful' could be 'ogle' (I've seen this in another clue) and 'ogle' is found in the answer.
A single letter 'r' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for ogler that I've seen before include "one having inappropriate look?" , "Sexy looker" , "One who leers" , "One staring" .)