Attractive second husband involved in home improvements (5)
I believe the answer is:
dishy
'attractive' is the definition.
(similar in meaning)
'second husband involved in home improvements' is the wordplay.
'second' becomes 's' (common abbreviation).
'husband' becomes 'h' (abbreviation).
'involved in' is an insertion indicator.
'home improvements' becomes 'diy' (DIY is do-it-yourself work done on the home).
's'+'h'='sh'
'sh' going within 'diy' is 'DISHY'.
(Other definitions for dishy that I've seen before include "Gorgeous" , "Good-looking (colloq.)" , "Informally good-looking, like plate?" , "Handsome" , "Attractive" .)