Movement of trains to Acton central (7)
I believe the answer is:
transit
'movement' is the definition.
(transit is a kind of movement)
'of trains to acton central' is the wordplay.
'of' is an anagram indicator (the answer comes from or \'of\' the letters).
'central' says to take the centre.
The central letter of 'acton' is 't'.
'trains' anagrammed gives 'transi'.
'transi'+'t'='TRANSIT'
(Other definitions for transit that I've seen before include "The carrying of people etc" , "Movement from place to place" , "Pass across" , "To pass through/across" , "Act of passing across" .)