Time for a bad liar to keep quiet? (5)
I believe the answer is:
april
'time' is the definition.
(I've seen this before)
'a bad liar to keep quiet?' is the wordplay.
'a bad' indicates anagramming the letters.
'to keep' indicates putting letters inside.
'quiet?' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'liar' with letters rearranged gives 'aril'.
'aril' placed around 'p' is 'APRIL'.
'for' is the link.
(Other definitions for april that I've seen before include "Spring month" , "Start of the second quarter" , "Part of spring" , "First of Herrick's four sweet months" , "Eliot's 'cruellest month'" .)