Attempt by Heather to get accommodation for horses (8)
I believe the answer is:
stabling
'accommodation for horses' is the definition.
(I've seen this before)
'attempt by heather' is the wordplay.
'attempt' becomes 'stab' (to have a stab is to attempt something).
'by' means one lot of letters go next to another.
'heather' becomes 'ling' (synonyms).
'stab'+'ling'='STABLING'
'to get' acts as a link.
(Other definitions for stabling that I've seen before include "Putting the horse in his home" , "beastly accommodation" , "Hackney pad?" , "Accommodation for horses" , "Horse accommodation" .)