Bird swallowing managed seconds for journey (7)
I believe the answer is:
transit
'journey' is the definition.
(I've seen this before)
'bird swallowing managed seconds' is the wordplay.
'bird' becomes 'tit' (I've seen this before**).
'swallowing' indicates putting letters inside.
'managed' becomes 'ran' (I've seen this before).
'seconds' becomes 's'.
'ran'+'s'='rans'
'tit' going around 'rans' is 'TRANSIT'.
'for' is the link.
(Other definitions for transit that I've seen before include "Pass across" , "Conveyance of goods or people - tin star (anag)" , "Crossing - passage" , "Moving" , "Passage of heavenly body" .)