Walk round and queue for gymnastic apparatus (10)
I believe the answer is:
trampoline
'for gymnastic apparatus' is the definition.
(trampoline is a kind of gymnastic apparatus)
'walk round and queue' is the wordplay.
'walk' becomes 'tramp' (tramp can mean to walk around).
'round' becomes 'o' (o is a circular letter).
'and' says to put letters next to each other.
'queue' becomes 'line' (a line of people).
'tramp'+'o'+'line'='TRAMPOLINE'
(Other definitions for trampoline that I've seen before include "Bouncy activity here" , "where pike may count in competition" , "bouncer" , "on which people go up and down" , "Sprung gymnastic equipment" .)