Crossword Genius

Guided a jerk over castle (7)

Ross

I believe the answer is:

citadel

'castle' is the definition.
(thesaurus)

'guided a jerk over' is the wordplay.
'guided' becomes 'led' ('lead' can be a synonym of 'guide').
'jerk' becomes 'tic' (I've seen this before).
'over' says the letters should be written backwards.
'led'+'a'+'tic'='ledatic'
'ledatic' in reverse letter order is 'CITADEL'.

(Other definitions for citadel that I've seen before include "where Salvationists meet" , "Fort, fastness" , "Fortress -- dialect (anag)" , "Structure in place to protect" , "Highly-secure building" .)

I've seen this clue in The Telegraph.
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