Nobody has time at the moment (6)
I believe the answer is:
minnow
'nobody' is the definition.
(I've seen this before)
'time at the moment' is the wordplay.
'time' becomes 'min' (short for minute).
'at the moment' becomes 'now' (at the present moment).
'min'+'now'='MINNOW'
'has' acts as a link.
(Other definitions for minnow that I've seen before include "Small fry" , "Tiny freshwater fish" , "Not much of a catch?" , "Small river fish" , "he's unimportant" .)