Trip with mates, I suspect, that's good for morale (4,6)
I believe the answer is:
team spirit
'good for morale' is the definition.
'team spirit' can be an answer for 'morale' (synonyms). I'm not certain of the 'good for' bit.
'trip with mates i suspect' is the wordplay.
'with' means one lot of letters go next to another.
'suspect' is an anagram indicator (a suspicious or unusual spelling).
'mates'+'i'='matesi'
'trip' after 'matesi' is 'matesitrip'.
'matesitrip' with letters rearranged gives 'TEAM SPIRIT'.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for team spirit that I've seen before include "mood in the group" , "Cooperative had plenty of?" , "Esprit de corps" , "feeling of camaraderie" , "Morale" .)