Husband permitted to wear tucked in jumper? (7)
I believe the answer is:
athlete
'jumper?' is the definition.
(jumper is a kind of athlete)
'husband permitted to wear tucked in' is the wordplay.
'husband' becomes 'h'.
'permitted' becomes 'let' (I've seen this before).
'to wear' indicates putting letters inside.
'tucked in' becomes 'ate' (I've seen this in other clues).
'h'+'let'='hlet'
'hlet' going inside 'ate' is 'ATHLETE'.
(Other definitions for athlete that I've seen before include "Sportsman in physical contests" , "expected to be agile, of course" , "Jumper, say" , "Contestant" , "Strangely, the tale of one who is fit" .)