Passionate chap in bunk's in charge (8)
I believe the answer is:
romantic
'passionate' is the definition.
(thesaurus)
'chap in bunk's in charge' is the wordplay.
'chap' becomes 'man' (I've seen this before).
'in' indicates putting letters inside.
'bunk' becomes 'rot' ('rot' can be a synonym of 'bunk').
'in charge' becomes 'ic'.
'man' placed into 'rot' is 'romant'.
'romant'+'ic'='ROMANTIC'
(Other definitions for romantic that I've seen before include "Amorous (but not practical?)" , "Imaginative or amorous" , "Relating to love" , "Coin mart (anag.)" , "Fantastic" .)