Star Trek seen regularly to take care of one’s needs fully (4)
I believe the answer is:
sate
'take care of one's needs fully' is the definition.
(to satisfy a need)
'star trek seen regularly' is the wordplay.
'seen regularly' indicates alternate letters.
'star'+'trek'='startrek'
The alternate letters of 'startrek' are 'SATE'.
'to' acts as a link.
(Other definitions for sate that I've seen before include "spicy meat" , "Satisfy completely" , "Satisfy - surfeit" , "Gorge, overeat" , "Quench" .)