Actress's last desire to be fashionable (5)
I believe the answer is:
swish
'be fashionable' is the definition.
(I've seen this before)
'actress's last desire' is the wordplay.
'last' indicates one should take the final letters.
'desire' becomes 'wish' (wish is a kind of desire).
The last letter of 'actresss' is 's'.
's'+'wish'='SWISH'
'to' is the link.
(Other definitions for swish that I've seen before include "Smart; stylish" , "Smart, fashionable" , "Impressively smart" , "Classy" , "Extravagant" .)