Be aware of the present given to King (4)
I believe the answer is:
know
'be aware of' is the definition.
(I've seen this before)
'present given to king' is the wordplay.
'present' becomes 'now' (both can mean the current period).
'given to' says to put letters next to each other.
'king' becomes 'K' (chess abbreviation).
'now' put after 'k' is 'KNOW'.
'the' acts as a link.
(Other definitions for know that I've seen before include "Realise" , "Have information" , "Have awareness of" , "Be dangerously well informed" , "A Channel port, type of sole" .)