State of uncertainty with member gaining nothing (5)
I believe the answer is:
limbo
'state of uncertainty' is the definition.
(I've seen this before)
'member gaining nothing' is the wordplay.
'member' becomes 'limb' (limb is a kind of member**).
'gaining' says to put letters next to each other.
'nothing' becomes 'o' (looks like zero - 0).
'limb'+'o'='LIMBO'
'with' acts as a link.
(Other definitions for limbo that I've seen before include "Uncertain or intermediate state" , "Steps beneath bar" , "neither here nor there" , "Imaginary place for lost or neglected things" , "Caribbean dance - place for lost souls" .)