Tom with half of meal giving sign of approval? (6,2)
I believe the answer is:
thumbs up
'sign of approval?' is the definition.
(I've seen this before)
'tom with half of meal' is the wordplay.
'tom' becomes 'Thumb' (folklore character Tom Thumb).
'with' says to put letters next to each other.
'half of' suggests halving the letters.
'meal' becomes 'supper' (supper is a kind of meal).
'supper' halved is 'sup'.
'thumb'+'sup'='THUMBS UP'
'giving' acts as a link.
(Other definitions for thumbs up that I've seen before include "Manual sign of approval" , "successfully received" , "okay" , "gets green light, perhaps" , "Digital signal" .)