Appropriate that I am putting on weight (7)
I believe the answer is:
impound
'appropriate' is the definition.
(appropriate can mean to take or impound)
'i am putting on weight' is the wordplay.
'i am' becomes 'I'm' (contraction).
'putting on' is a charade indicator (letters next to each other).
'weight' becomes 'pound' (pound is a kind of weight).
'im'+'pound'='IMPOUND'
'that' is the link.
(Other definitions for impound that I've seen before include "Confiscate" , "Shut up" , "Seize and take custody of (items)" , "Seize (goods) legally" , "put cordon round" .)