When providing clues or suggestions about something, there are several options to use instead of the phrase "give indication of." One alternative is to say "hint at," which implies a subtle suggestion or indication. Another possible synonym is "suggest," which encompasses a wider range of potential clues and indicators. "Imply" is also a useful substitute that conveys a more indirect or implied message. If you want to be more specific, you may choose to use the phrase "point to," which implies a more direct and specific clue. To express a more definite indication or assertion, the phrase "show evidence of" could be used.