Traveller allowed key is satisfied (7)
I believe the answer is:
replete
'is satisfied' is the definition.
(I've seen this before)
'traveller allowed key' is the wordplay.
'traveller' becomes 'rep' (travel company worker).
'allowed' becomes 'let' (to let is to allow or permit).
'key' becomes 'e' (a musical key).
'rep'+'let'+'e'='REPLETE'
(Other definitions for replete that I've seen before include "Filled, well supplied" , "charged" , "Chock-a-block" , "Stuffed, gorged, sated" , "Well stocked or gorged" .)