Get hint perhaps and increase tension (7)
I believe the answer is:
tighten
'increase tension' is the definition.
(I've seen this before)
'get hint perhaps' is the wordplay.
'perhaps' indicates an anagram.
'get'+'hint'='gethint'
'gethint' anagrammed gives 'TIGHTEN'.
'and' acts as a link.
(Other definitions for tighten that I've seen before include "Turn, a screw say" , "Make tauter" , "becoming tense" , "Stiffen" , "get tense" .)