Honour a husband, showing a sort of charm (5)
I believe the answer is:
obeah
'a sort of charm' is the definition.
(type of Caribbean sorcery)
'honour a husband' is the wordplay.
'honour' becomes 'obe' (Order of the British Empire award).
'husband' becomes 'h'.
'obe'+'a'+'h'='OBEAH'
'showing' acts as a link.
(Other definitions for obeah that I've seen before include "Caribbean witchcraft" , "spells in Caribbean" , "African sorcery" , "amulet" , "that's charming" .)