Expressed regret, seeing Goa spoiled when travelling (10)
I believe the answer is:
apologised
'expressed regret' is the definition.
(I've seen this before)
'goa spoiled when travelling' is the wordplay.
'when travelling' indicates an anagram.
'goa'+'spoiled'='goaspoiled'
'goaspoiled' anagrammed gives 'APOLOGISED'.
'seeing' acts as a link.
(Other definitions for apologised that I've seen before include "Was sorry" , "Expressed regret for what one has done" , "admitted faults" .)