Sofa, not posh, with more space to sit? (6)
I believe the answer is:
longer
'more space to sit?' is the definition.
I can't judge whether this defines the answer.
'sofa not posh' is the wordplay.
'sofa' becomes 'lounger'.
'not' suggests deleting specific letters.
'posh' becomes 'u' (abbreviation for upper-class - opposite to non-U).
'lounger' with 'u' taken out is 'LONGER'.
'with' is the link.
Can you help me to learn more?
(Other definitions for longer that I've seen before include "Less short" , "Measuring greater distance end to end" , "More extended" , "Of greater length" , "Of greater duration" .)