One slow-moving bridge team to fare badly (5)
I believe the answer is:
snail
'one slow-moving' is the definition.
(slow-moving creature)
'bridge team to fare badly' is the wordplay.
'bridge team' becomes 'sn' (South and North players in a game of bridge).
'to fare badly' becomes 'ail' (ail can mean to suffer or fare badly).
'sn'+'ail'='SNAIL'
(Other definitions for snail that I've seen before include "Mollusc with coiled shell" , "Land mollusc" , "Slow slithery mollusc" , "Proverbially slow-moving mollusc" , "Its speed was emulated by Shakespeare's creeping schoolboy" .)