Whip round wearing floppy hat and tie (6)
I believe the answer is:
attach
'tie' is the definition.
(to tie is to link or attach)
'whip round wearing floppy hat' is the wordplay.
'whip' becomes 'cat' (cat o' nine tails, cat for short is a type of whip).
'round' shows that the letters should be reversed in order.
'wearing' means one lot of letters goes inside another.
'floppy' indicates an anagram.
'cat' reversed gives 'tac'.
'hat' with letters rearranged gives 'ath'.
'tac' going within 'ath' is 'ATTACH'.
'and' is the link.
(Other definitions for attach that I've seen before include "Add or join to" , "Unite?" , "Bind, fasten" , "Affix, connect" , "Associate" .)