Poor female host Helen, lonely and unloved? (2,3,5)
I believe the answer is:
on the shelf
'lonely and unloved?' is the definition.
('on the shelf' can mean without a partner)
'poor female host helen' is the wordplay.
'poor' indicates an anagram.
'female' becomes 'f' (common abbreviation).
'f'+'host'+'helen'='fhosthelen'
'fhosthelen' anagrammed gives 'ON THE SHELF'.
(Other definitions for on the shelf that I've seen before include "Where you might find Emma" , "Book here, perhaps" , "Despairing of a husband" , "destined never to meet her beau?" .)