Gaped around, so loveless, as one panted! (6)
I believe the answer is:
Here is my best explanation:
'one panted' is the definition.
(I've seen this before)
'gaped around so loveless' is the wordplay.
'around' means one lot of letters goes inside another.
'so loveless' becomes 's' (I am not sure about this - if you are sure you should believe this answer much more).
'gaped' placed around 's' is 'GASPED'.
'as' is the link.