Left husband, leaving the dull hunk in uncertain state (5)
I believe the answer is:
limbo
'uncertain state' is the definition.
(I've seen this before)
'left husband leaving the dull hunk' is the wordplay.
'left' becomes 'L' (common abbreviation).
'husband' becomes 'h'.
'leaving' is a deletion indicator.
'the dull hunk' becomes 'himbo' (a good-looking but stupid man).
'himbo' with 'h' taken away is 'imbo'.
'l'+'imbo'='LIMBO'
'in' acts as a link.
(Other definitions for limbo that I've seen before include "State of unceratinty" , "dance in West Indies" , "Unsettled state" , "Unresolved state" , "(Between) two extremes" .)