Support the Yorkshire struggle losing wicket (7)
I believe the answer is:
trestle
'support' is the definition.
(I've seen this before)
'the yorkshire struggle losing wicket' is the wordplay.
'the yorkshire' becomes 't' (Northern English pronunciation of 'the').
'struggle' becomes 'wrestle' (wrestle is a kind of struggle).
'losing' is a deletion indicator.
'wicket' becomes 'w'.
'wrestle' with 'w' taken out is 'restle'.
't'+'restle'='TRESTLE'
(Other definitions for trestle that I've seen before include "support for board" , "Supporting framework for, eg, table top" , "Support for table top" , "Braced framework" , "Supporting structure for bridge or tabletop" .)