Tempted to start digging after a half decent frost (7)
I believe the answer is:
enticed
'tempted' is the definition.
('entice' can be a synonym of 'tempt')
'start digging after a half decent frost' is the wordplay.
'start' suggests taking the first letters.
'after' says to put letters next to each other.
'a half' suggests halving the letters.
'frost' becomes 'ice' (synonyms).
The first letter of 'digging' is 'd'.
'decent' cut in half is 'ent'.
'ent'+'ice'='entice'
'd' put after 'entice' is 'ENTICED'.
'to' acts as a link.
(Other definitions for enticed that I've seen before include "Persuaded with attractive offer" , "were seductive" , "Tempted, lured" , "Given inducement" .)