Medium or perhaps strong? You can have instant coffee at first (7)
I believe the answer is:
psychic
'medium' is the definition.
(I've seen this before)
'perhaps strong? you can have instant coffee at first' is the wordplay.
'at first' says to take the initial letters.
The first letters of 'perhaps strong you can have instant coffee' is 'PSYCHIC'.
'or' is the link.
(Other definitions for psychic that I've seen before include "Sensitive to paranormal stimuli" , "Having extrasensory perception or occult powers" , "Spiritualistic medium" , "One is apparently sensitive to things beyond the rest of us" , "Person with ESP" .)