Remain uneasy heading for the Tower? (7)
I believe the answer is:
minaret
'tower?' is the definition.
(minaret is a kind of tower)
'remain uneasy heading for the' is the wordplay.
'uneasy' is an anagram indicator.
'heading for' suggests taking the first letters.
The first letter of 'the' is 't'.
'remain' is an anagram of 'minare'.
'minare'+'t'='MINARET'
(Other definitions for minaret that I've seen before include "Building" , "religious tower" , "tower in the Middle East" , "Muezzin's tower" , "Slender tower with balconies" .)