Archaeologist Croft tucking into fish that's suspect? (5,1,3)
I believe the answer is:
smell a rat
'suspect?' is the definition.
(I've seen this before)
'archaeologist croft tucking into fish' is the wordplay.
'archaeologist croft' becomes 'lara' (I can't explain this - if you can you should believe this answer much more).
'tucking into' indicates putting letters inside.
'fish' becomes 'smelt' (smelt is a kind of fish).
'lara' placed into 'smelt' is 'SMELL A RAT'.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for smell a rat that I've seen before include "Suspect deception" , "Suspect trickery (colloq.)" , "Sense something suspicious" , "Suspect something wrong" , "Have suspicion something is afoot" .)