Though remote, it can still be at hand (7)
I believe the answer is:
control
'hand' is the definition.
(thesaurus)
'though remote it can still be at' is the wordplay.
I cannot really see how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found in the answer.
'at' could be 'on' (location) and 'on' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for control that I've seen before include "domination" , "Manage - government" , "Rule" , "Direct or determine" , "Regulate with self-possession?" .)