Booth blocked by single week’s delay (9)
I believe the answer is:
stonewall
'delay' is the definition.
(I've seen this before)
'booth blocked by single week's' is the wordplay.
'booth' becomes 'stall' (synonyms).
'blocked by' is an insertion indicator (block can mean to plug a gap in something).
'single' becomes 'one' (a single thing - only one).
'week' becomes 'w' (abbreviation).
'one'+'w'='onew'
'stall' enclosing 'onew' is 'STONEWALL'.
(Other definitions for stonewall that I've seen before include "Obstruct by refusing to answer questions" , "Use delaying tactics as in cricket" , "delay in parliament" , "Stand firm" , "Refuse to co-operate" .)